What should you know about dark chicken skin underarms?

Small rough bumps around hairs may fit keratosis pilaris, while tender red or pus-filled bumps can fit folliculitis. Darkening may remain after a rash or repeated rubbing settles. Deodorant fragrance, tight clothing, sweat and frequent shaving can irritate this delicate fold. The pattern, texture, itch, pain and timing help distinguish causes; colour alone cannot diagnose one condition.

Wash gently, pat the fold dry and choose loose, breathable clothing. Pause harsh scrubs, picking and fragranced products. If shaving triggers bumps, use a clean sharp razor, shaving gel and light strokes in the direction of hair growth; trimming may be kinder to the skin. A clinician can advise whether a moisturising keratolytic or another treatment suits you. Read about [Folliculitis](/conditions/folliculitis/) and [Keratosis Pilaris](/conditions/keratosis-pilaris/) for related patterns.

Arrange a dermatology review if the area is painful, warm, rapidly changing, repeatedly draining, strongly itchy, or not settling after gentle care. Seek prompt medical attention for spreading redness, fever, or a tender lump that limits arm movement. New thick, velvety darkening in several folds also deserves assessment because skin changes can sometimes accompany an underlying health issue.

Could this be folliculitis, keratosis pilaris, contact irritation or post-inflammatory pigmentation? Which products, hair-removal method and active ingredients should I stop or use? Would a sample, examination or review of medicines help clarify the cause?