No one has mentioned it yet, but my thought is that you could have a bad infection. Is it warm to touch? Does it feel like a hard ball, or abcess? Just checking, cause if it is an infection, you may need medical treatment. Keep an eye on that, you cant let something like that fester if it is an infection. Hope it isnt, and you get well.
Also I had a similar problem in my glute, Presser was very gracious to put warm compresses on it for me, and he massaged it every night for a week, and now I am all better.....Funny thing though, even after I told him I was feeling better, he insisted on giving me more treatments...LOL....LMAO
Big JC