What should you know about impetigo finger?

Bacteria can enter through a cut, hangnail, bite, cracked skin, or a rubbed area near the nail. The sore may begin as a red spot or tiny blister, then leak fluid and form a crust. Itching can lead to touching or scratching, which transfers infection to nearby skin or another person. Check the finger and surrounding hand for new spots, while remembering that crusting can have several causes; Crusting Skin offers broader symptom context. Atopic Dermatitis may also leave skin more vulnerable when the barrier is inflamed.

Have the finger examined if the diagnosis is uncertain, the sore is near the nail, or new lesions are appearing. Wash gently with clean water and mild soap, dry carefully, and use a clean cover that does not squeeze the finger. Wash hands after dressing the area, keep nails short, and avoid biting nails or sharing towels, phones, tools, and personal items. Do not use leftover antibiotics or scrape away crusts. Depending on the number and location of sores, a clinician may prescribe topical treatment or oral medicine; read Topical Antibiotic Therapy and Antibiotics For Skin Infection for more detail.

Seek prompt care if swelling, throbbing pain, warmth, pus, or redness moves along the finger or hand, or if bending the finger becomes difficult. Urgent assessment is needed with fever, rapidly worsening swelling, red streaking, severe pain, numbness, or a dusky colour. Contact a clinician if the sore involves the nail, keeps returning, or fails to settle with prescribed treatment.

Ask how to distinguish impetigo from a nail-fold infection or dermatitis, how often to change the dressing, whether close contacts need advice, and which changes should trigger a follow-up.