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Last Updated: Aug 29, 2019
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Dr. Vinay Kumar TheedaDermatologist • 11 Years Exp.Dermatologist,Cosmetologist,Venerologist &Sexologist
Sun exposure not only causes darkening of skin but also accelerates ageing changes, and also skin cancers. Sunscreens should be applied at least 20-30mins before going outside during day and should be applied every 2hrs, if you remain outdoors.