When the skin next to a child’s fingernail suddenly turns red, puffy, and sore to the touch, it can be alarming. This is often paronychia, an infection of the skin around the nail. Early cases can frequently be managed at home, but how far it has progressed determines whether a visit is needed.
Why It Happens
Paronychia occurs when the skin around the nail, the cuticle, or the nail fold is damaged and bacteria get in under the skin. Common entry points include picked hangnails, nail biting, and small tears in the skin. Bacteria are the most usual cause, but viruses such as herpes virus and fungi such as Candida can also be responsible. The area typically looks red and swollen and feels warm, and in more advanced cases a pocket of pus can form.
How It Looks at Different Ages and Stages
Children who bite their nails or pick at hangnails tend to be affected most often. Early on, the skin beside the nail may look slightly pink and hurt when pressed, but over a few days swelling can grow and pus can collect, forming an abscess. An infection that lingers or keeps coming back may involve a fungus, which is one reason a clinician’s assessment can be useful.
Home Care
When no clear pus pocket is present, soaking the finger in warm water is the usual first step. Guidance varies among pediatric sources, ranging from about 15 minutes twice a day to about 20 minutes a few times a day. Checking the water temperature yourself first helps avoid burns. After soaking, dry the finger well; some sources suggest a thin layer of antibiotic ointment, and a pharmacist or pediatrician can help you choose one. Squeezing or lancing the area yourself can spread the infection and is generally discouraged. To prevent recurrence, trim hangnails with small scissors or clippers instead of pulling them, and pay attention to nail-biting habits.
Common Parent Misconceptions
Many parents believe squeezing a swollen nail fold will speed healing, but it can push the infection deeper. Others expect one soak to fix everything, when early inflammation usually takes several days to settle. Some assume any redness beside the nail is a fungus, yet sudden, painful swelling is more often bacterial, and antifungal creams alone may not help.
Signs That Need Medical Care
Nemours advises seeing a doctor if pain, swelling, warmth, or redness is getting worse, if red streaks extend from the infected skin, if pus is draining, or if the finger isn’t improving as expected. If an abscess has formed, a doctor may drain it, and antibiotics or antifungal medicine may be prescribed depending on the cause. If the finger is very swollen with fever, is hard to move, or red streaks are spreading quickly, seek urgent care or emergency care right away. This information reflects U.S. guidance; if you live in another country, please check with a local pediatrician. This information isn’t a diagnostic tool and doesn’t replace advice from a medical professional.