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According to the Mayo Clinic these are some known causes of leg cramps. As you can see alcoholism and dehydration are listed. I doubt that a couple of glasses of wine will cause them, but drinking water right before going to bed may help.
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.