Under the skin bumps!!

Hi I’m 13 and I don’t exactly have pimples. I mean I will get the odd one but other than that I never get them. However I do have little under skin bumps that are really annoying me. They are only on my forehead and I don’t know how to get rid of them. My skin is extremely sensitive and I can barely use any products without getting an allergic reaction. Does anyone have any tips for me xx