The ultraviolet radiation from sun's rays result in pigmentation. Pigmentation disorders and wrinkles are avoided by decreasing the exposure to sun's light. Covering the body helps in reducing the exposure to sun's rays. Full sleeves dress, made of cotton decreases the exposure to sun light. In case of short sleeved dress, apply liberal amounts of sunscreen with high sun protection factor.
Sunscreen is not only applied on the face, but also on the sleeves, neck and feet. Excessive pigmentation on your cheek might be due to over exposure of melanocytes to sun's rays. Patches of pigments are due to melanin production by certain melanocytes and no production by others. Drink adequate amount of water to help in detoxification. Commercially available lotions and creams are also effective in pigmentation. Topical application of lime juice to your cheeks might prove beneficial, as lime is a natural bleach.
Take the help of experts in a parlor to bleach the affected area. Visit a cosmetologist in case of no relief. Fruit bleaches are equally effective, as they are devoid of side effects. Creams containing hydroquinone is helpful. Wear a scarf on your head, such that covering your cheeks.
answered by Dr C