Reduce friction by wearing loose, breathable clothing
Keep the area clean and dry
Use a gentle exfoliant 1 to 3 times per week
Apply a moisturizer with urea, lactic acid, or ceramides
Use products with niacinamide, azelaic acid, or vitamin C
Avoid harsh scrubbing and strong fragranced products
Maintain a healthy weight if excess friction is a factor
Treat any fungal infection, rash, or irritation promptly
Use sunscreen on exposed inner thigh skin
Consider prescription treatments from a dermatologist for stubborn pigmentation
Seek medical advice if the darkening is sudden, thick, velvety, itchy, or spreading