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.
Most of the time, no apparent cause for night leg cramps can be identified. In general, night leg cramps are likely to be related to muscle fatigue and nerve problems. The risk of having night leg cramps increases with age. Pregnant women also have a higher likelihood of having night leg cramps. Several conditions, such as kidney failure and diabetic nerve damage, are known to cause night leg cramps. But if you have one of these, you're most likely aware of it and have symptoms other than night leg cramps.
Leg cramps may happen for several reasons: lack of fluids, injury, muscle strain, or staying in the same position for a long period of time. Blood circulation problems or pressure on the nerves in the spine can also cause cramp-like pains in your legs. Other common causes include: 1  Pregnancy. 2  Diabetes. 3  Decreased potassium level. 4  Neuromuscular disorders, such as Parkinsonâs disease. 5  Certain medications. 6  Alcohol and excess caffeine use. 7  Several vitamin deficiencies may directly or indirectly lead to muscle cramps including thiamine, pantothenic acid, and vitamin B6.