I am having what I think is a sciatic problem in my left buttocks. It feels ok when I am walking but when I sit for a long time I get an achy feeling deep in the buttocks on one side almost where my leg joint is. When I get up in the morning it is very stiff even with a pillow between my legs. Went to chiropractor 3 times and it felt good that day but when I wake up it's stiff again. I also feel twitching in the nerve from buttocks to calf sometimes.