i have a killer headache on the top of my head and sometimes behind my eyes pretty much all the time, if its not real bad, its just really tight like i have a head cold, it started about 4-5 weeks after coming of a tren acetate cycle, ive had mris catscans blood work eye exam the works, and nothing seems to be wrong, as far as the headaches while lifting go, it could be a strain in ur neck like was mentioned, the muscles in the very back of the neck get tight and strained esp when pressin ur head back against a bench while pushing, could aslo be from not breathing correctly while lifting heavey while at the same time straining the neck........as far as i go, i guess im just gonna have to live with a headache forever lol