What Is The Pink Patches On Skin After Sunbath?

I went on a sunbed about 8 weeks ago -I am sure this is not related- ie never been sunburnt so I'm worried about a few round shaped patches of skin thatbis really dry and quite sore. The patches are pink and I'm noticing more appear-it's rather embarrassing as they are at the top of my thighs at the back, and on my bum! Please help!