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.
The exact cause of a leg cramp is not well understood, but there are some risk factors that are thought to contribute to this condition: 1  Muscle fatigue. 2  Heavy exercising. 3  Dehydration. High weight (not necessarily obesity)  Electrolyte 1  imbalances. Medications (statins, prednisone, others...)