What should you know about dry skin under armpits?

The armpit is a warm, folded area exposed to friction, moisture and personal-care products. Shaving can cause tiny surface injuries, while deodorants or antiperspirants may irritate sensitive skin. Dryness with itch, redness or scale can also occur with Atopic Dermatitis, Psoriasis or Asteatotic Eczema. A rash that is moist, sharply bordered, painful or concentrated in the fold may need a clinician to distinguish irritation from infection or another inflammatory condition.

Pause fragranced deodorants, scrubs and shaving until the skin settles. Wash gently with lukewarm water, rinse well and pat dry, including within the fold. Apply a bland, fragrance-free moisturiser in a thin layer to intact skin; Emollient Therapy explains how barrier-supporting products are used. Wear loose, breathable clothing and change out of damp garments. Do not apply strong medicated creams to the fold without advice, because thin skin can be more sensitive.

Book an assessment if the rash lasts, returns with each product, becomes thick or scaly, or affects both armpits without an obvious trigger. Seek prompt care for spreading redness, marked tenderness, pus, fever, a painful lump or rapidly increasing swelling.

Ask whether shaving, deodorant, eczema, psoriasis or infection best explains the pattern, which moisturiser is suitable for a skin fold, and when it is safe to resume hair removal or antiperspirant use.