There are many causes of hand cramps in children, such as catching a cold, calcium deficiency, acute strains and epilepsy. 1. Cold: Children who are not properly covered during bedtime or who are exposed to cold for a long time outdoors may suffer from hand cramps or muscle stiffness, and the symptoms will usually be gradually relieved after keeping warm. 2. Calcium deficiency: Children’s rapid growth and development may cause calcium deficiency, resulting in spasms and cramps in the hand muscles. 3. Acute strains: improper exertion of the child’s play will lead to hand muscle strains, which may cause localized edema, but also hand muscle spasms, pain, resulting in the phenomenon of children’s hand cramps. 4. Epilepsy: epilepsy is usually due to the child’s congenital brain development abnormalities, epileptic seizures abnormal brain discharges, which can lead to the phenomenon of children’s hand cramps. The child’s hand cramps, there may also be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.