Leg Thigh Cramp From Driving Cramps In His Leg?? Please Help.?

Cramps in his leg?? please help.? - leg thigh cramp from driving

My fiance has had chronic pain in his left leg for a month! It is located in the back of the thigh above the knee and now the pain is spreading to the knees. It's so bad that you can drive or do anything but suffer and go to work and earning a living. It is not active, never exercises and is now too painful to run it. It works bear GameStop, it provides at least eight hours per day. We have no guarantee that we avoided taking him to the doctor, but I tried Icy Hot, ibuprofen, potassium, and a multivitamin with the purchase of foods rich in potassium. Even a massage every night well, but these are only temporary solutions if you know what vitamins are working or not.

No idea what could be? All tips to help?

BTW: it is more painful to sit and feels better when standing.