How are you? It is difficult to say with out physical examination and history what might be causing pain
in your legs, but few situations can be discussed. They are claudication, nocturnal cramps, thrombophlebitis
and peripheral neuropathy. Of all these thrombophlebitis and peripheral neuropathy can occur during walking
and during rest.
Normally, blood flow can increase up to ten-fold to meet the increased need for additional oxygen in
exercising muscles. However, when the leg arteries are blocked, blood flow cannot increase in response to
exercise and pain develops. Claudication typically occurs during physical activity such as walking and is
promptly relieved by a brief resting period (2-5 minutes). As atherosclerosis progresses and blockage becomes
more severe, a burning/aching pain in the feet and toes will occur particularly at night time while lying
flat. This pain, known as rest pain, occurs because the arteries of the leg can no longer deliver adequate
blood flow to the feet, even at rest.
Nocturnal leg cramps usually awaken the sufferer with a spasm-like pain in the calf like a charley horse. The
incident lasts a few seconds or minutes and may be repeated throughout the night. They commonly occur with
strenuous exercise, when using a group of muscles repeatedly, or when circulation is cut off from sitting
awkwardly or due to dehydration.
I would suggest to discuss all these possibilities with your doctor and follow his advise.