Wash the underarms daily with a gentle cleanser
Exfoliate 1–2 times per week with a mild scrub or chemical exfoliant
Use a fragrance-free deodorant or antiperspirant
Avoid frequent shaving; use a sharp razor and shaving gel if shaving
Moisturize the area with a gentle, non-irritating lotion
Wear loose, breathable clothing to reduce friction
Reduce friction from tight clothes and repeated rubbing
Avoid harsh products, lemon, baking soda, and strong bleaching creams
Treat ingrown hairs and irritation promptly
Maintain a healthy weight if excess skin friction is contributing
Check for causes like insulin resistance, diabetes, or hormonal issues
See a dermatologist if the darkening is sudden, thick, itchy, painful, or spreading
Use dermatologist-recommended treatments such as azelaic acid, niacinamide, retinoids, or prescription creams