Hello, Thanks for posting your query. As you had leg numbness during cold exposure it becomes necessary to rule out Raynaud s Phenomenon which can be triggered by cold temperatures.The condition occurs because your blood vessels go into a temporary spasm which blocks the flow of blood to certain parts of the body, usually the fingers and toes. You should visit your doctor and get blood tests as Raynaud s Phenomenon can be due to any other disease. Avoid triggers like cold temperatures, stress, smoking, caffeine etc. Get your self warm when you experience numbness or pain.If you are unable to control your symptoms yourself then nifedipine may be recommended. Hope it helps. Take Care!