Hi, Thanks for your question on HCM I do understand your solicitousness “As” per your clinical history is concerned you have rigorous calf muscle cramps at night so you require doing few things at home to avert it -: 1)Do massage your leg at night and stretching exercises. 2)Apply a hot compress to the area if the contraction does not subside. 3)You can drink more than 10 glasses of water every day. 4)Take calcium, Potassium chloride, and vitamin C conventionally 5)You can take fruits like bananas, grapes, apricots, and dates which are sublime sources of potassium and magnesium. 6)Other good sources of minerals include pulses, cabbage, broccoli, oranges, tomatoes, pork, lamb, tuna, potatoes, and corn. Spinach, okra, Swiss chard, brown rice and almonds are high in magnesium. You can take cheese, tofu, whole milk products and beans which can avail you maintain calcium levels. 7)You can take a nighttime snack of almonds; raisins, prunes, plums or tomatoes as they are high in magnesium can obviate leg cramps at night. 8)You can propping your feet up with a pillow while slumbering on your back to obviate cramps. Hope that helps