<s>[INST] Yes I have been experiencing severe calf and off and on knee pain, whether walking or running. Stretching and medication do not help. I recently began having tingling in the same calf as well. I often have a limp even when wearing flat shoes like flip flops it actually seems worst. There is so much pressure all the time. I have been to the doctor and was not given any information as to what it could be. [/INST] HelloThank you for trusting HCMdear how old are you?? male or female??are you smoker??dear from your history possible causes are  peripheral neuropathy,sciatica,compartmental syndrome or peripheral vascular disease etc..above i mentioned possible causes from your history . is it muscular,neuronal, vascular,joint problem is come to know after examination. please consult your neurophysician he will examine and treat you accordingly. I think I answered to your question if you have more questions feel free to ask.take care </s>