 [ Symptoms ] my father has paralysis in his left leg is in pain [ Disease ] in my opinion he has intermittent claudications he can try circulatory exercise in the form of beurgers exercise  elevate leg do ankle pump 15 times if he can then drop it for 15 seconds  or he can go for medical treatment like lyrica or gabapentin however i recommend investigation if he has a back problem disc or spondylitis  also a dopplar to make sure there is no thrombosis good luck