Hand cramps always consider calcium deficiency, vascular disease, cerebrovascular disease sequelae, myofasciitis and other reasons. 1. Calcium deficiency: Hand cramps can occur in children or the elderly due to insufficient calcium intake, and the symptoms can be alleviated by supplementing calcium and vitamin D. 2. 2. Vascular disease: Hand cramps can occur due to insufficient blood supply to the upper limbs caused by narrowing of blood vessels in the upper limbs and muscle ischemia. 3. Sequelae of cerebrovascular disease: cerebral hemorrhage, cerebral infarction left sequelae, limb muscle tension increases, hand cramps appear. 4. Myofasciitis: aseptic inflammation of upper limb myofascia, localized adhesion, can cause hand cramps. Hand cramps always go to the hospital to check, clear specific causes, further treatment for the cause.