<prompt> Answer this question truthfullyWhat are the main methods of prevention for dysplastic nevus?  <response>: <reason> The following preventive measures reduce the risk of melanoma: Avoid sunlight and ultraviolet radiation exposureUse sunblocks at least 15 SPF when exposed to sunlight. Reapply sunblock every 2-3 hours and after sweatingswimming Seek shaded areas Wear wide-brimmed hats Avoid sunbeds 