if it hurts that bad it probably didn't absorb right, and you might be developing an abcess. Try it in the ass.......I'm shooting testosterone propionate/NPP - Nandrolone PhenylPropionate - in the same syringe, and yeah....there's a "bit" of knot there that's "mildly" uncomfortable.......but if it's causing you not to sleep there's something wrong. I don't shoot in the quads because it's immediately too painful, like before I even start to inject the quads are twitching all over the place........so I can imagine if I was shooting testosterone propionate into my quads, I would have problems.......some people just can't inject in certain places.