What should you know about itchy armpits, neck and groin?

These areas contain folds where sweat and rubbing can irritate the skin. Intertrigo is inflammation in a fold and may cause soreness, redness, dampness or a burning feeling. Skin yeast infection can also present in warm, moist folds, sometimes with a sharply irritated edge or small nearby spots. A new deodorant, detergent, fabric, shaving product or fragrance may cause contact irritation. Itching in the groin can have several explanations, and the appearance of the skin helps distinguish them.

Check whether the itch is on both sides, whether the skin is cracked or weeping, and whether it began after a product or medicine changed. Do not assume the symptom identifies one condition.

Wash gently with lukewarm water, pat folds dry and change out of sweaty clothing. Choose loose, breathable fabrics and pause newly introduced fragranced products. Avoid scratching, scrubbing, and sharing towels. A pharmacist or clinician can advise whether a topical antifungal treatment fits the appearance; avoid using a steroid cream on a suspected fungal area unless a clinician directs you, because it can alter the appearance and allow infection to spread.

Arrange a medical assessment if the itch is persistent, recurrent, spreading, painful, cracked, draining or associated with fever. Seek prompt care for rapidly worsening redness, marked swelling, pus, severe tenderness, or involvement of the eyes or mouth. A clinician may inspect the folds and ask about products, medicines, sweating and close contacts before recommending treatment.

Ask: Could the distribution suggest intertrigo or skin yeast infection? Which products should I stop? Is a skin sample needed? How should I use a topical antifungal treatment, and what should make me return sooner?