I have some numbness since my microdisectomy on my L4/L5 disc. I got hurt and a piece of bone was broken off and on my sciatic nerve and I had it removed. So now I ve been having weird nocturnal leg cramps that got a lot better once I went off my statin. Cramping tho only happens where I have numbness. I need to take the statin. High cholesterol is hereditary. Also Hamstring has completely locked up randomly during the day. Moments later it s fine. Nocturnal cramps go away after standing. Back Dr. says not related to my back?