Wash the underarms gently with a mild cleanser
Exfoliate the area 1 to 2 times per week
Stop using harsh deodorants or fragranced products
Use a deodorant for sensitive skin
Avoid shaving too closely
Use a clean, sharp razor if shaving
Shave in the direction of hair growth
Moisturize the underarms regularly
Apply aloe vera gel
Apply niacinamide serum
Apply glycolic acid or lactic acid products
Use vitamin C products
Try a gentle retinoid at night
Wear loose, breathable clothing
Reduce friction from tight clothing
Avoid frequent waxing if it irritates the skin
Treat any rash, itching, or infection promptly
Maintain a healthy weight if friction is a factor
See a dermatologist if darkening is sudden, severe, or persistent