There are many ways to treat calf cramps at night, but first you need to know what causes them. If it is caused by excessive exercise during the day, try to reduce the amount of exercise during the day and do some leg stretches after exercise to relax the leg muscles, and you can also apply heat to the legs. If calcium deficiency is the cause of calf cramps at night, you should take calcium supplements and eat foods with high calcium content, such as bean products and milk, and get more sunlight to promote calcium absorption. If it is caused by cold legs, pay attention to leg warmth and do not blow directly on the legs during sleep with fans or air conditioners.