you are having a vascular claudication here are the factors specifically in your case) 1) diabetic vascular problem - decreased blood circulation especially at the lower extremities 2) calf pain at walking - this is an effect of number 1, when you walk , the blood and oxygen demand of your muscles increases, considering the fact that you already have a limited blood supply to start with bec of number 1, you start to feel an ischemic pain (pain in any part of the body due to lack of oxygen carrying blood , the supply of your blood, cannot cope up with the increased demand of blood during walking only) 3) relieved by not walking on it (decreased oxygen and blood demands of muscles, hence no pain) 4) burning sensation ( is a sign that a nerve is also not getting enough blood supply) here is on practical tip you can do by yourself to confirm your problem try using a stationary bike and use it for 15mins. are the symptoms similar? if yes then thats your answer right there. you indeed have it. next what to do. well its an expected part of having diabetes. Exercises strengthen muscles and train muscles to function with less oxygen and helps muscles to work better despite impaired blood flow in your legs. As a result you will be able to do more with less pain and be more active with an overall increase in health and well-being. Exercise will help in controlling your blood sugar and blood pressure, which will aid in decreasing your likelihood of developing more severe Peripheral Vascular disease