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Paronychia Basics

Paronychia is an infection of the skin around a fingernail or toenail. The infected area can become swollen, red, and painful, and a pus-filled blister (abscess) may form.

Most of the time, paronychia is not serious and can be treated at home. In rare cases, the infection can spread to the rest of the finger or toe and lead to a deeper infection that may require a doctor's help.

It's unlikely that your child will get paronychia in a toe (unless he or she has an ingrown toenail). But fingernail paronychia is one of the most common hand infections.


Paronychia usually happens when the skin around a person's nail is irritated or injured. When the skin is damaged like this, germs can get in and cause an infection. These germs may be bacteria (causing bacterial paronychia) or fungi (fungal paronychia).

Kids and teens can develop paronychia from:

Kids with diabetes also have a higher chance of getting paronychia infections.


Chances are, if your child has paronychia, it will be easy to recognize. You'll probably see an area of red, swollen skin around a nail. The area will be painful, warm, and tender to the touch, and there could be a pus-filled blister.


Bacterial paronychia usually appears very suddenly, while fungal paronychia may take longer to become apparent. Fungal paronychia may cause less obvious symptoms than bacterial paronychia, but it can be a chronic condition, meaning it can last for a long time.

Chronic paronychia can cause changes in the affected nail. It might turn a different color or look as though it is detached or abnormally shaped.

In rare cases, if the paronychia is especially severe and goes untreated, the infection can spread beyond the area of the nail.


If your child has paronychia that doesn't get better with treatment or if the infection seems to be spreading, call a doctor.

Usually, a doctor or nurse practitioner will be able to diagnose paronychia just by examining the infected area. In some cases, the doctor may take a pus sample and have it examined in a laboratory to determine what type of bacteria or fungus is causing the infection.


Treating paronychia depends on how severe the infection is and whether it has started to spread. Often, just soaking the infected nail in warm water for 20 minutes a few times a day will help it heal on its own in a few days.

If an abscess (a pus-filled blister) forms, it may need to be drained by a doctor. In rare cases, part of the nail may have to be removed. This should never be attempted at home, as it could increase the risk of serious complications. The doctor also might prescribe antibiotic medications to treat the infection.

Usually, once an abscess is treated, the affected finger or toe heals quickly with no long-term complications.

For fungal paronychia, the doctor may prescribe antifungal creams, lotions, or oral medications to help treat the underlying cause of the condition.


Have kids follow these tips to minimize their risk of paronychia:

As much as possible, have kids try to avoid injuring their nails and the skin around them. Nails grow very slowly, so any damage to them can last a long time and increase the risk of paronychia.

Reviewed by: Sonali Mukherjee, MD
Date reviewed: January 2015

Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.

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OrganizationAmerican Academy of Dermatology Provides up-to-date information on the treatment and management of disorders of the skin, hair, and nails.
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