Hi, This may be caused by three things. Neuropathy or ischemic changes in legs or cellulitis. Cellulitis which is inflammation of subcutaneous tissues and may develop into diabetic foot with redness or pain in legs. Neuropathy may also be caused by diabetes but also other metabolic causes may be present or injury of the spine. It is presented with burning pain without skin changes. Last, ischemic changes happen due to poor circulation in legs. If this is not your case then these symptoms are indicating circulatory problems in legs which are common in this age and there may be present atherosclerosis that obstructs blood vessels and causes pain and blisters to form. You should do Doppler ultrasound of the leg or CT angiography to rule out such obstructive changes and then it can be treated properly by medications or by surgical and radiological procedures. Hope I have answered your query. Let me know if I can assist you further. Take care Regards, Dr. Iven Romic Rommstein, General Surgeon