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.
Although the risk of getting night leg cramps increases with. age, it's often difficult to pinpoint the cause. In fact, these cramps often occur for no known reason. Dehydration, prolonged sitting, or not getting enough. potassium, calcium or magnesium in your diet can be associated. with leg cramps. So can certain medications - including. diuretics, beta blockers and other blood pressure drugs.