answer:Are you overweight, inactive, sedentary? Are you older, 50+? Do you drink enough water? Dehydration can cause leg cramps as can lack of Potassium. Have you had a back injury? What about vascular disease, have you been checked for arterialsclerosis? We are not doctors here and cannot give any medical advice. Your best bet is to find a new doctor and get a 2nd or 3rd opinion.