Starting sometime last week, I have been experiencing pain in the back of my head (where the head meets neck, I suppose) whenever I do a heavy set. Exercise doesn't matter, squats to bench to pushups all have given me this pain. It's a sort of throbbing, and makes me feel a little bit light headed. I have never experienced anything like this before last week in my weightlifting.
Intuitively, I would think that I tense up in that area when I do a heavy set. However, I am confused as to why this pain has come out of nowhere all of a sudden. It's not like I am suddenly lifting absurdly heavy weights. In fact I am still pretty weak, and lift little girl weights by WBB standards