Well i have freckles and in the past would burn and blister very easily but since i discovered P20 maybe 10 years ago ive had no problem whatsoever - and i do go to VERY hot places, barbados, goa, kenya, jamaica etc etc and lay in the sun for hours, i am now a lovely tanned colour! I can only think you must not have left it to 'bond' with your skin as per the instructions, or you did not use it correctly. My sister also loves the sun and was diagnosed with skin cancer a few years ago, she was recommended this product at the hospital as it was the only one that is totally safe (when used correctly) being a sun filter