Why do i randomly start itching inside tanning beds?

EVERY time i go you guys! its weird..i know tanning isn't good for me. but what can yah do? im sure a few who read will be the types to get frustrated with me for not taking care of my body and making a bad decision. but i really just started going and now that summers here. i plan on saving money and hitting the real rays outside. but im curious, why will i randomly itch when im in the beds? its not concentrated on one area of my body its all over, but it isnt continuous. its like one second "ah damn my ear itches got get that" next second "ah now its my leg, now my foot, belly so on and so on..and its weird because im not getting burnt. although its not good for me in the first place i still try to be as safe as possible everytime i go. and i would never exceed a reasonable time limit for myself. so tell me...can i be allergic to the uv rays or what? theres no rash no sign, nothing..its almost like when you feel like a bug is crawling on you and there is nothing there..also i use lotion and it still happens..and it happens when i dont use lotion either.