I have black knee I don't know what to do to turn in back to my skin color can u help me ?

I have black knee please help me please

Dark elbows and knees are caused due to dryness. The skin on your knees and elbows are devoid of oil glands, which causes your elbows and knees look dark or discolored. Heredity may also play a role in dark joints. Try using a good moisturizer regularly to soften your knees and elbows. There are over-the-counter creams containing ingredients such as kojic acid or 2% hydroquinone that can help fade the dark discoloration. Alpha hydroxy creams can also improve your skin's texture and clarity by exfoliating the dead skin cells. If you don't see any improvement after 1-2 months, please consult with a dermatologist for a treatment option that's suitable for you.