Tanning beds

i was told by a friend it i layed in the tanning bed every day that it would dry up the white spots i have on my back plus i have them all over my legs. i have quit using my steroid because it wasnt helping. i no longer have it on my cooter or butt for a change but they have really popped out on my legs . they are white and look like i have a grit on top. so can anyone please help me. i have had 4 biopsy all ready to make sure i dont have cancer. AND it sure has not been fun at all .i need all the help anyone can give me itchy from nc