Wash the area gently with mild soap and water
Exfoliate lightly 1 to 2 times per week
Stop using harsh deodorants or antiperspirants
Avoid shaving too often or use a sharp clean razor
Consider waxing or trimming instead of shaving
Wear loose, breathable clothing
Keep the area dry and reduce friction
Use a moisturizer with ingredients like niacinamide, lactic acid, or glycolic acid
Apply aloe vera gel or vitamin E
Use products with kojic acid, azelaic acid, or alpha arbutin
Try a gentle chemical exfoliant if your skin tolerates it
Avoid home remedies that irritate the skin
Maintain a healthy weight if friction is a factor
Manage any underlying conditions such as insulin resistance or diabetes
See a dermatologist if the darkening is sudden, severe, itchy, or thickened