If you have pigment, nothing to see here. If you lack it and/or have been reeely bad to your skin like lots of us pre-awareness fossils who thought frying in the sun was okay to do... I was reminded yesterday at the dermatologist that using sunscreen and staying covered are effective ways to minimize sun damage. Apply high-SPF sunscreen liberally, and reapply if during sweat sessions. (I type this to remind myself, too.) Despite my ravaged fair skin, record of prior skin surgeries/burnings, and insistence on being outdoors, my derm says I'm in good shape. A surprise, actually. He zapped a few areas with nitrogen and sent me off. Just wanted to remind that preventative measures are not for naught.