Hand cramps can occur in the elderly, usually with age, arteriosclerosis, blood supply disorders, or a drop in temperature leads to cramps, high blood fat can also lead to poor blood circulation, prone to cramps in the middle of the night, the heart function is not good, cardiac insufficiency. Blood supply disorders can also lead to cramps, calcium deficiency is also a common cause of cramps, postmenopausal women are prone to calcium deficiency, once calcium deficiency, not only at night cramps, can also occur during the day, overwork can also occur cramps.