I had the total hip done and the surgeon admitted he could have cut the lateral femoral cutaneous nerve or damaged it when they pull the incision and muscles apart. The doctor tested me with a pin that they use to test for diabetic neuropathy and found several areas on the foot. I went off my vitamin B, calcium and statin and things improved but my foot still feels clumsy, cold and like it is frozen. The doctor put me on one of those meds to "treat" this but it put me in a serotonin syndrome. When my primary doc comes back from extended education, I'm going to work with her because now that strange feeling is going up past the ankle on the left side and into the calf. I think a lot of times the diagnosis is a guess because there is no treatment and people react to the meds. Good luck to you and the journey you will be on.