Acute paronychia on a toe

The fold may become red, warm, swollen and sore inside footwear. A curved or ingrown nail edge, close corner trimming, picking, a pedicure injury or repeated rubbing can break the seal around the nail; pus may then collect in the tender area.

The side of a toenail can press into swollen skin and maintain irritation even after the initial cut has closed. Tight shoes add friction and trap moisture, while an ingrown corner can create a recurring entry point for bacteria.

Not every sore nail edge is infected. A clinician checks for warmth, drainage, a pus pocket and spreading redness, then considers whether nail shape or footwear pressure also needs attention to prevent another episode.

Soak a mild case in comfortably warm water during the day, then dry carefully between the toes and around the nail. Choose roomy, breathable footwear or an open shoe that does not rub the swollen fold, when safe for your activity.

Leave the nail corner and cuticle intact; do not dig underneath, cut a notch, squeeze the fold or attempt drainage. A clinician can decide whether local care, prescribed antibiotics, drainage or management of an ingrown nail edge is appropriate.

Arrange timely assessment if pus appears, walking becomes increasingly painful, redness spreads onto the toe, swelling worsens or the nail edge remains embedded. Fever, red streaking, rapidly spreading redness, darkening skin, numbness or severe pain requires urgent evaluation.

Seek help sooner if you have diabetes, poor sensation, reduced circulation or weakened immunity. In those settings, avoid self-cutting and have even a small wound checked because pressure and infection may be difficult to judge by feeling alone.

Ask whether the toenail is ingrown, whether pus needs drainage and how the nail should be trimmed after healing. Bring details about footwear, pedicures, prior episodes, diabetes or circulation problems, and ask what signs should prompt a foot-care follow-up.