I say more of a sensation because it doesn't really hurt, it just gets all...hot
It's in my right hip flexor. I feel it only in the parallel to below-parallel portion of the lift, same thing going up and down. I did 3 sets and I only felt it on my last set (heaviest), and even there I didn't feel it on the first rep, my second and third I did and then I called it quits for fear of shanking myself.
This happened to me a few months ago when I was squatting but it went away by my next session. I'm hoping for the same this time, still, I have some questions.
1) Should I just squat through it? It doesn't bother me, really, I'm just afraid it might be foreshadowing injury
2) What would you assume is the cause of this? Bad form, inflexibility (should I do some stretches beforehand?)