Q Every time I try to get a tan, I end up with white spots on my legs (like white freckles) and patches of discolouration on my face. The longest I would sit in the sun is 20 to 30 minutes and I always use sun lotion (with organic aloe vera), starting off with factor 15, and, after a few days, I use factor 8. What causes this to happen and is there anything I can do to prevent it as I am going on a sun holiday in August?