If the brain's blood supply is decreased too much, the person may pass out (syncope). Symptoms may worsen when changing position from lying down or sitting, to standing up. In addition to feeling dizzy, associated symptoms may include: 1  Sweating. 2  Weakness. 3  Nausea and vomiting. 4  Shortness of breath. 5  Chest pain.
Although most muscle cramps are harmless, some may be related to an underlying medical condition, such as: 1  Inadequate blood supply. Narrowing of the arteries that deliver blood to your legs (arteriosclerosis of the extremities) can produce cramp-like pain in your legs and feet while you're exercising. 2  Nerve compression.
Symptoms of leg cramps. A leg cramp is an episode of sudden pain in the muscles of the leg caused by an involuntary contracting (shortening) of the leg muscle. Most leg cramps occur in the calf muscles and, less commonly, in the feet and thighs. Cramps can last from a few seconds up to 10 minutes.