The symptoms of leg cramps at night: 1, may be due to poor sleep quality, lack of rest, fatigue, poor posture, too long exercise, resulting in the accumulation of local acidic metabolites, causing leg muscle cramps, resulting in leg cramps. 2, may also be due to calcium deficiency, in poor health and weight loss people so more likely to occur leg cramps. 3, the lack of trace elements of magnesium The first thing you need to do is to get a good idea of what you’re doing. It may lead to leg cramps at night.