I have painful in my left calf until my leg back are no felling what can i do?

Well, this depends on what you've been doing prior to the pain. If you have been sitting in lotus or "indian" style for a while this could cause that. If you've been sitting with a crossed-leg for a long time this could cause it. Also, you didn't say what the level of pain intensity is. If it just feels numb, I'd take two aspirins and get off your feet for an hour or two. If it persists, go to a doctor right away. This all depends upon a) how long you've had this pain b) what you were doing before the pain developed and c) the intensity of the pain. If you've had the pain for more than 30 minutes and the pain is intense, it's time to take a few hundred bucks out of the piggy bank and go to the doctor.