What is causing this?

I get a lot of tension and migraine headaches. I also have frequent back and neck pain. Does anyone know what could be causing this and what could relieve the pain. I've been having these pains since I was about 11 and I'm 19 now. I have been taking pain relievers but I don't want to mess up my body from taking them too much. Plz help 10 pts! Thanks in advance!