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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.
2. Dehydration. Drinking too much alcohol can cause extreme dehydration and imbalances in your cells which can result in muscle soreness, strains and cramps. What a lot of people may not realize is that you can lose a lot of muscle mass which has a number of side effects like weaker strength and overall performance.