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Infections

  • Abscess Abscess

    People can get abscesses on the skin, under the skin, in a tooth, or even inside the body. Most abscesses are caused by infection, so it can help to know what to do. Find out in this article for teens.

  • Anthrax Anthrax

    It's extremely unlikely that you or someone you know could get anthrax. But what exactly is anthrax, and should you be concerned about it?

  • Bacterial Vaginosis Bacterial Vaginosis

    BV is the most common vaginal infection. Although it's a mild infection, it can cause serious problems if it's not treated. Find out how to recognize BV and what to do about it in this article for teens.

  • Bronchitis Bronchitis

    Bronchitis is an inflammation of the lining of the bronchial tubes. When a person has bronchitis, it may be harder for air to pass in and out of the lungs.

  • Cellulitis Cellulitis

    Cellulitis is a skin infection that involves areas of tissue just below the skin's surface. It can affect any part of the body, but it's most common on exposed areas, such as the face, arms, or lower legs.

  • Cholera Cholera

    Cholera is an intestinal infection that mostly affects people in tropical regions. Find out more about cholera in this article for teens.

  • Cold Sores (HSV-1) Cold Sores (HSV-1)

    Cold sores (also known as fever blisters) are pretty common and lots of people get them. So what causes them and what can you do?

  • Coping With Colds Coping With Colds

    Most teens get between two and four colds each year. Read this article for the facts on colds and ways to feel better when you catch one.

  • Dengue Fever Dengue Fever

    This infectious disease can cause high fevers, headaches, rashes, and pain throughout the body. Find out what to do about dengue fever - and how to avoid it.

  • E. Coli E. Coli

    Undercooked burgers and unwashed produce are among the foods that can harbor E. coli bacteria and lead to infection and severe diarrhea. Here's how to protect yourself.

  • Ebola Ebola

    The deadly Ebola virus can make people very sick or even kill them. Ebola is contagious, but when people are properly diagnosed, isolated, and cared for, the risk of passing the disease to others is low.

  • Encephalitis Encephalitis

    Encephalitis is an inflammation of the brain. Although encephalitis sounds scary, understanding its causes, symptoms, and treatment can help you feel prepared to deal with it if you ever need to.

  • Flu Facts Flu Facts

    Every year from October to May, millions of people across the United States come down with the flu. Get the facts on the flu - including how to avoid it.

  • Food Poisoning Food Poisoning

    The germs that get into food and cause food poisoning are tiny, but can have a powerful effect on the body. Find out what to do if you get food poisoning - and how to prevent it.

  • Gastrointestinal Infections and Diarrhea Gastrointestinal Infections and Diarrhea

    Nearly everybody gets diarrhea every once in a while, and it's usually caused by gastrointestinal infections. It's nothing to be embarrassed about. Read this article to learn more.

  • Hepatitis A Hepatitis A

    Hepatitis A is a contagious liver infection caused by the hepatitis A virus (HAV). The hepatitis A vaccine has helped to make the infection rare in the United States.

  • Hepatitis B Hepatitis B

    Hepatitis B can move from one person to another through blood and other body fluids. For this reason, people usually get it through unprotected sex or by sharing needles.

  • Hepatitis C Hepatitis C

    The hepatitis C virus (HCV) spreads through blood or other body fluids, and can lead to cirrhosis or liver cancer. The most common way people become infected is by sharing drug paraphernalia.

  • Hib Disease (Haemophilus Influenzae Type b) Hib Disease (Haemophilus Influenzae Type b)

    Hib is pretty rare in U.S. teens because most get vaccinated as babies. But for people who do get Hib, it can sometimes be serious. Here's more information about this bacterial infection and how it might show up.

  • How Long Is Mono Contagious? How Long Is Mono Contagious?

    If someone gets mono, the virus stays in that person's body for life. The virus may surface from time to time and possibly infect someone else. Here are the facts on how mono works.

  • Impetigo Impetigo

    Impetigo is a skin infection caused by fairly common bacteria. Read this article to learn how to recognize it and what to do about it.

  • Lyme Disease Lyme Disease

    Lyme disease can be treated if it's caught early. Find out what causes it, how it's treated, and how to prevent it.

  • Mad Cow Disease Mad Cow Disease

    It's called mad cow disease because it affects a cow's nervous system, causing a cow to act strangely. But how does this disease affect people?

  • Measles Measles

    Measles is rare in the United States because most kids get the measles vaccine. But some teens can still get measles. Here are the basics about this very contagious disease.

  • Meningitis Meningitis

    You may be wondering what the deal is with meningitis because you've heard frightening stuff about meningitis outbreaks in the news.

  • Molluscum Contagiosum Molluscum Contagiosum

    The name sounds dramatic, like a Harry Potter spell. Luckily, molluscum contagiosum isn't a big deal. Find out what to do about it in this article for teens.

  • MRSA MRSA

    MRSA is a type of bacteria that the usual antibiotics can't tackle anymore. The good news is that there are some simple ways to protect yourself from being infected. Find out how.

  • Osteomyelitis Osteomyelitis

    Sometimes a bad cut that gets infected can lead to even worse things, like a bone infection called osteomyelitis. The easiest way to protect yourself is to practice good hygiene.

  • Paronychia Paronychia

    Paronychia is an infection of the skin around a fingernail or toenail. Most of the time, it's not serious. Find out what causes it, what to do, and how to prevent it.

  • Peritonsillar Abscess Peritonsillar Abscess

    A peritonsillar abscess is an area of pus-filled tissue at the back of the mouth, next to one of the tonsils. Find out how it happens and what to do.

  • Pinkeye (Conjunctivitis) Pinkeye (Conjunctivitis)

    Conjunctivitis, commonly called pinkeye, is an inflammation of the tissue covering the eye and inner surface of the eyelid.

  • Pneumonia Pneumonia

    Pneumonia is a common lung infection that can usually be treated without a hospital stay.

  • Rabies Rabies

    You probably know that you can get rabies from an animal bite. But what is rabies, and what does it do to the body? Find out in this article for teens.

  • Rocky Mountain Spotted Fever Rocky Mountain Spotted Fever

    Rocky Mountain spotted fever (RMSF) is a disease caused by a bacteria that is carried by certain types of ticks. Learn about the signs and symptoms of RMSF and tips for preventing infection in this article.

  • Salmonellosis Salmonellosis

    People often think of salmonellosis as food poisoning, but food is only one way the bacteria Salmonella can be spread.

  • Shigellosis Shigellosis

    Shigellosis is an intestinal infection caused by bacteria that can give a person bloody diarrhea and cause intestinal pain. Good hand washing is the best way to prevent shigellosis.

  • Shingles Shingles

    Shingles is rare in teens with healthy immune systems, and mostly affects older adults. But it's good to know the basics about this skin rash, which is caused by the same virus that causes chickenpox.

  • Sinusitis Sinusitis

    If you've been waking up with headaches, feeling stuffy or congested, and experiencing swelling around your eyes, you may have sinusitis - an infection of the sinus air spaces found in the bones around the nose.

  • Smallpox Smallpox

    You might be wondering what smallpox is and whether you or anyone you know is at risk for getting it. Learn the facts.

  • Staph Infections Staph Infections

    Staph bacteria can live harmlessly on many skin surfaces. But the bacteria can get into wounds and cause an infection. Get the details in this article for teens.

  • Strep Test (Video)

    This video shows what it's like to get a strep test.

  • Strep Throat Strep Throat

    Strep throat is a common infection that usually needs to be treated with antibiotics. Find out how to recognize the signs of strep throat and what to expect if you have it.

  • Swimmer's Ear (External Otitis) Swimmer's Ear (External Otitis)

    Swimmer's ear is an infection of the ear canal that can be caused by different types of bacteria or fungi. Find out how to prevent or treat it.

  • Tetanus Tetanus

    Tetanus occurs when a certain type of bacterial infection grows in a contaminated wound. Because it can be serious, it's important to get immunized. Find out about tetanus and how to protect yourself against it.

  • Tonsillitis Tonsillitis

    You wake up and your throat is swollen and you have a fever. Could it be tonsillitis? Find out what tonsillitis is, how to treat it, and how to prevent it.

  • Toxic Shock Syndrome Toxic Shock Syndrome

    Although toxic shock syndrome (TSS) can be serious, it's a very rare illness.

  • Tuberculosis Tuberculosis

    Tuberculosis (TB) is making a comeback in the United States today - particularly among the homeless, those in prison, and those rendered susceptible because of HIV infection.

  • Urinary Tract Infections Urinary Tract Infections

    A urinary tract infection (UTI) is one of the most common reasons that teens visit a doctor. Learn about the symptoms of UTIs, how they're treated, and more in this article.

  • Warts Warts

    Most warts are easy to treat and are rarely cause for alarm. Read this article for more information on warts and how to get rid of them.

  • West Nile Virus West Nile Virus

    You've probably heard about West Nile virus and know that mosquitoes have something to do with it. Learn more about the virus, including how you can protect yourself.

  • What to Do if You Get the Flu What to Do if You Get the Flu

    You've probably heard warnings about flu season. If you do get the flu this year, read this article on how to feel better.

  • What's My Lyme Disease Risk? What's My Lyme Disease Risk?

    Is the thought of Lyme disease making you feel you'll be safer in the comfort of your room than the great outdoors? This info can help you know if you're at risk for Lyme disease.

  • What's the Difference Between Infectious and Contagious? What's the Difference Between Infectious and Contagious?

    Find out what the experts have to say.

  • 5 Tips for Surviving Shots 5 Tips for Surviving Shots

    If you're afraid of shots, you're not alone. Next time your doc asks you to roll up your sleeve, try these tips.

  • 5 Ways to Fight the Flu 5 Ways to Fight the Flu

    Get tips for fending off the flu in this article for teens.

  • Bronchitis Bronchitis

    Bronchitis is an inflammation of the lining of the bronchial tubes. When a person has bronchitis, it may be harder for air to pass in and out of the lungs.

  • Coping With Colds Coping With Colds

    Most teens get between two and four colds each year. Read this article for the facts on colds and ways to feel better when you catch one.

  • Flu Center Flu Center

    Get the basics on how flu spreads and how to protect yourself.

  • Flu Facts Flu Facts

    Every year from October to May, millions of people across the United States come down with the flu. Get the facts on the flu - including how to avoid it.

  • Sinusitis Sinusitis

    If you've been waking up with headaches, feeling stuffy or congested, and experiencing swelling around your eyes, you may have sinusitis - an infection of the sinus air spaces found in the bones around the nose.

  • The Flu Vaccine The Flu Vaccine

    Doctors recommend that all teens get vaccinated against the flu. The good news is, it doesn't have to be a shot. Here are the facts on flu vaccines.

  • What to Do if You Get the Flu What to Do if You Get the Flu

    You've probably heard warnings about flu season. If you do get the flu this year, read this article on how to feel better.

  • When Can I Go Back to School If I Have the Flu? When Can I Go Back to School If I Have the Flu?

    Find out what the experts have to say.

  • Why Should I Care About Germs? Why Should I Care About Germs?

    Germs are tiny organisms that can cause disease - and they're so small that they can creep into your system without you noticing. Find out how to protect yourself.

  • 5 Ways to Fight the Flu 5 Ways to Fight the Flu

    Get tips for fending off the flu in this article for teens.

  • Bronchitis Bronchitis

    Bronchitis is an inflammation of the lining of the bronchial tubes. When a person has bronchitis, it may be harder for air to pass in and out of the lungs.

  • Cold Sores (HSV-1) Cold Sores (HSV-1)

    Cold sores (also known as fever blisters) are pretty common and lots of people get them. So what causes them and what can you do?

  • Coping With Colds Coping With Colds

    Most teens get between two and four colds each year. Read this article for the facts on colds and ways to feel better when you catch one.

  • Enlarged Adenoids Enlarged Adenoids

    Often, tonsils and adenoids are surgically removed at the same time. So, what are adenoids exactly?

  • Finding Low-Cost Medical Care Finding Low-Cost Medical Care

    If you need medical care but don't think you can afford it, you're not alone. Get tips on finding low-cost or free care in this article for teens.

  • Flu Center Flu Center

    Get the basics on how flu spreads and how to protect yourself.

  • Flu Facts Flu Facts

    Every year from October to May, millions of people across the United States come down with the flu. Get the facts on the flu - including how to avoid it.

  • Head Lice Head Lice

    Lice aren't dangerous, but they do spread from person to person easily. They can also be hard to get rid of. Find out how to prevent lice -- and what to do if someone you know has them.

  • How Long Is Mono Contagious? How Long Is Mono Contagious?

    If someone gets mono, the virus stays in that person's body for life. The virus may surface from time to time and possibly infect someone else. Here are the facts on how mono works.

  • Ingrown Toenails Ingrown Toenails

    A toenail is ingrown when it begins to break through and grow into the soft skin of the toe. Find out more about ingrown toenails.

  • Mononucleosis Mononucleosis

    It's sometimes called "the kissing disease," but kissing is just one of the ways that someone can catch mono.

  • Pinkeye (Conjunctivitis) Pinkeye (Conjunctivitis)

    Conjunctivitis, commonly called pinkeye, is an inflammation of the tissue covering the eye and inner surface of the eyelid.

  • Sinusitis Sinusitis

    If you've been waking up with headaches, feeling stuffy or congested, and experiencing swelling around your eyes, you may have sinusitis - an infection of the sinus air spaces found in the bones around the nose.

  • Tonsillitis Tonsillitis

    You wake up and your throat is swollen and you have a fever. Could it be tonsillitis? Find out what tonsillitis is, how to treat it, and how to prevent it.

  • Tonsils and Tonsillectomies Tonsils and Tonsillectomies

    Everybody's heard of tonsils, but not everyone knows what tonsils do in the body or why they may need to be removed. Find out here.

  • Urinary Tract Infections Urinary Tract Infections

    A urinary tract infection (UTI) is one of the most common reasons that teens visit a doctor. Learn about the symptoms of UTIs, how they're treated, and more in this article.

  • What to Do if You Get the Flu What to Do if You Get the Flu

    You've probably heard warnings about flu season. If you do get the flu this year, read this article on how to feel better.

  • What's the Difference Between Infectious and Contagious? What's the Difference Between Infectious and Contagious?

    Find out what the experts have to say.

  • Abscess Abscess

    People can get abscesses on the skin, under the skin, in a tooth, or even inside the body. Most abscesses are caused by infection, so it can help to know what to do. Find out in this article for teens.

  • Athlete's Foot Athlete's Foot

    Although the name athlete's foot sounds funny, if you have this skin infection, you're probably not laughing. The good news is that it is generally easy to treat.

  • Jock Itch Jock Itch

    Jock itch is a pretty common fungal infection of the groin and upper thighs. It is generally easy to treat - and avoid - by following a few simple steps.

  • Pityriasis Versicolor Pityriasis Versicolor

    Pityriasis versicolor is a rash caused by a fungus. It can appear over the chest, shoulders, and back, and is a common cause of skin rashes in teens.

  • Ringworm Ringworm

    Ringworm isn't a worm at all - it's the name for a type of fungal skin infection. The good news is that ringworm is easy to treat.

  • Vaginal Yeast Infections Vaginal Yeast Infections

    What are vaginal yeast infections? Can anything be done to prevent them?

  • What's the Difference Between Infectious and Contagious? What's the Difference Between Infectious and Contagious?

    Find out what the experts have to say.

  • Flu Center Flu Center

    Get the basics on how flu spreads and how to protect yourself.

  • About Sexually Transmitted Diseases (STDs) About Sexually Transmitted Diseases (STDs)

    You've probably heard lots of discouraging news about sexually transmitted diseases. The good news is that STDs can be prevented. Find out how to protect yourself.

  • Bacterial Vaginosis Bacterial Vaginosis

    BV is the most common vaginal infection. Although it's a mild infection, it can cause serious problems if it's not treated. Find out how to recognize BV and what to do about it in this article for teens.

  • Chlamydia Chlamydia

    Chlamydia is an STD that often has no symptoms, so lots of people can have it and not know it. Read this article to learn how to protect yourself.

  • Genital Herpes Genital Herpes

    You've probably heard lots of discouraging news about sexually transmitted diseases. The good news is that STDs can be prevented. Read about how to protect yourself.

  • Genital Warts (HPV) Genital Warts (HPV)

    You've probably heard lots about sexually transmitted diseases. The good news is that STDs can be prevented. For information on how to protect yourself and how to treat genital warts, read this article.

  • Gonorrhea Gonorrhea

    The STD gonorrhea can be very dangerous if it's not treated, even in someone who has mild or no symptoms. For information about how to protect yourself, read this article.

  • Hepatitis Hepatitis

    Hepatitis, an infectious liver disease, is more contagious than HIV. Find out about the different types of hepatitis.

  • Hepatitis B Hepatitis B

    Hepatitis B can move from one person to another through blood and other body fluids. For this reason, people usually get it through unprotected sex or by sharing needles.

  • HIV and AIDS HIV and AIDS

    There is no cure for AIDS, which is why prevention is so important. Get the facts on HIV/AIDS, as well as how it affects the body and is treated, in this article.

  • HIV Testing Resources HIV Testing Resources

    Often the only way to know if someone is infected with HIV is through testing. Here are the facts on what's involved in getting tested — and who should get tested for HIV and why.

  • How Do People Get AIDS? How Do People Get AIDS?

    AIDS, or acquired immunodeficiency syndrome, is a disease where the body is unable to fight off many infectious diseases as it normally could. Find out how AIDS is spread and how to protect yourself against it.

  • Molluscum Contagiosum Molluscum Contagiosum

    The name sounds dramatic, like a Harry Potter spell. Luckily, molluscum contagiosum isn't a big deal. Find out what to do about it in this article for teens.

  • Pelvic Inflammatory Disease (PID) Pelvic Inflammatory Disease (PID)

    Pelvic inflammatory disease, sometimes called PID, is an infection of the fallopian tubes, uterus, cervix, or ovaries. Learn how to protect yourself.

  • Pubic Lice (Crabs) Pubic Lice (Crabs)

    Pubic lice, or "crabs," are tiny insects that can crawl from the pubic hair of one person to another during sex. Read about symptoms, treatment, and prevention.

  • Syphilis Syphilis

    Syphilis is a sexually transmitted disease (STD) that spreads through oral, anal, or vaginal sex. Read about how to protect yourself.

  • Trichomoniasis Trichomoniasis

    Trichomoniasis is a curable disease that can be passed from one person to another during sex. The good news is that it can be prevented. Read about how to protect yourself.

  • Abscess Abscess

    People can get abscesses on the skin, under the skin, in a tooth, or even inside the body. Most abscesses are caused by infection, so it can help to know what to do. Find out in this article for teens.

  • Anthrax Anthrax

    It's extremely unlikely that you or someone you know could get anthrax. But what exactly is anthrax, and should you be concerned about it?

  • Athlete's Foot Athlete's Foot

    Although the name athlete's foot sounds funny, if you have this skin infection, you're probably not laughing. The good news is that it is generally easy to treat.

  • Bedbugs Bedbugs

    Bedbugs are in the news because of recent infestations. Learn the telltale signs of these irritating pests - and how to deal with a bite.

  • Cellulitis Cellulitis

    Cellulitis is a skin infection that involves areas of tissue just below the skin's surface. It can affect any part of the body, but it's most common on exposed areas, such as the face, arms, or lower legs.

  • Cold Sores (HSV-1) Cold Sores (HSV-1)

    Cold sores (also known as fever blisters) are pretty common and lots of people get them. So what causes them and what can you do?

  • Eczema Eczema

    Eczema is a common skin problem among teens. If you have eczema, read this article to find out more about it and how you can deal with the skin stress.

  • Erythema Multiforme Erythema Multiforme

    Erythema multiforme is a rash that appears as red, target-shaped ("bulls-eye") patches or sores on the skin. Find out what causes it - and what to do - in this article for teens.

  • Head Lice Head Lice

    Lice aren't dangerous, but they do spread from person to person easily. They can also be hard to get rid of. Find out how to prevent lice -- and what to do if someone you know has them.

  • Impetigo Impetigo

    Impetigo is a skin infection caused by fairly common bacteria. Read this article to learn how to recognize it and what to do about it.

  • Jock Itch Jock Itch

    Jock itch is a pretty common fungal infection of the groin and upper thighs. It is generally easy to treat - and avoid - by following a few simple steps.

  • Lyme Disease Lyme Disease

    Lyme disease can be treated if it's caught early. Find out what causes it, how it's treated, and how to prevent it.

  • Molluscum Contagiosum Molluscum Contagiosum

    The name sounds dramatic, like a Harry Potter spell. Luckily, molluscum contagiosum isn't a big deal. Find out what to do about it in this article for teens.

  • Paronychia Paronychia

    Paronychia is an infection of the skin around a fingernail or toenail. Most of the time, it's not serious. Find out what causes it, what to do, and how to prevent it.

  • Pityriasis Versicolor Pityriasis Versicolor

    Pityriasis versicolor is a rash caused by a fungus. It can appear over the chest, shoulders, and back, and is a common cause of skin rashes in teens.

  • Ringworm Ringworm

    Ringworm isn't a worm at all - it's the name for a type of fungal skin infection. The good news is that ringworm is easy to treat.

  • Rocky Mountain Spotted Fever Rocky Mountain Spotted Fever

    Rocky Mountain spotted fever (RMSF) is a disease caused by a bacteria that is carried by certain types of ticks. Learn about the signs and symptoms of RMSF and tips for preventing infection in this article.

  • Scabies Scabies

    Scabies is a skin infection caused by tiny mites that burrow into the top layer of human skin to lay their eggs. Learn how scabies is spread, how to avoid it, and how doctors treat it.

  • Shingles Shingles

    Shingles is rare in teens with healthy immune systems, and mostly affects older adults. But it's good to know the basics about this skin rash, which is caused by the same virus that causes chickenpox.

  • Smallpox Smallpox

    You might be wondering what smallpox is and whether you or anyone you know is at risk for getting it. Learn the facts.

  • Toxic Shock Syndrome Toxic Shock Syndrome

    Although toxic shock syndrome (TSS) can be serious, it's a very rare illness.

  • What's My Lyme Disease Risk? What's My Lyme Disease Risk?

    Is the thought of Lyme disease making you feel you'll be safer in the comfort of your room than the great outdoors? This info can help you know if you're at risk for Lyme disease.

  • What's the Difference Between Infectious and Contagious? What's the Difference Between Infectious and Contagious?

    Find out what the experts have to say.

  • Anthrax Anthrax

    It's extremely unlikely that you or someone you know could get anthrax. But what exactly is anthrax, and should you be concerned about it?

  • Appendicitis Appendicitis

    Appendicitis is an inflammation of the appendix, and requires surgery. Find out the symptoms and what doctors do to treat it.

  • E. Coli E. Coli

    Undercooked burgers and unwashed produce are among the foods that can harbor E. coli bacteria and lead to infection and severe diarrhea. Here's how to protect yourself.

  • Food Poisoning Food Poisoning

    The germs that get into food and cause food poisoning are tiny, but can have a powerful effect on the body. Find out what to do if you get food poisoning - and how to prevent it.

  • Gastrointestinal Infections and Diarrhea Gastrointestinal Infections and Diarrhea

    Nearly everybody gets diarrhea every once in a while, and it's usually caused by gastrointestinal infections. It's nothing to be embarrassed about. Read this article to learn more.

  • Salmonellosis Salmonellosis

    People often think of salmonellosis as food poisoning, but food is only one way the bacteria Salmonella can be spread.

  • Stomachaches Stomachaches

    Lots of different problems can cause similar kinds of stomach pain - not all of them related to the digestive system. Here are some clues about what could be going on.

  • Tapeworm Tapeworm

    A worm that grows in the intestines by eating your food is pretty icky to think about. This article provides the basics on tapeworm infections and how to prevent them.

  • The 5-Second Rule The 5-Second Rule

    Almost everyone has dropped food on the floor and still wanted to eat it. Does the 5-second rule give you the excuse you need? Or is it just a myth?

  • What's the Difference Between Infectious and Contagious? What's the Difference Between Infectious and Contagious?

    Find out what the experts have to say.

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