How To Treat Itchiness And Sharp Pain In Skin Due To Skin Tanning?

I just have a quick question. I was recently tanning about 2 days ago in a tanning salon. I had went for three days and that was it. The first day I went for 10 minutes, the second day I did 13 minutes, and the last day I did full time/15 minutes. Ever since, my back has been very itchy and I can't stop it. It's a very bad itch where I cannot do whatever I have to do because it feels like bug bites or needles. The itching is a very sharp pain. I was wondering what I needed to do! Or what kind of lotion I should buy for this?