Many parents found that the child will occasionally appear hands and feet twitching when sleeping, this situation belongs to a normal physiological phenomenon, parents can not worry too much, if it is found that the child sleep often appear some short twitching, parents should know the reason, so as to be able to avoid this situation. 1, calcium deficiency, calcium is a necessary element of the human body, the body if the calcium element is not enough will appear a lot of diseases, especially children are most prone to convulsions, the child sleep convulsions may be simply caused by a lack of calcium, parents only need to supplement the child’s calcium in a timely manner. 2, epilepsy, epilepsy of this disease, children have become a high incidence of people, the incidence of this disease is increasingly high, the symptoms of seizures is no sign of the beginning of non-stop convulsions, parents must pay great attention to, must be in some regular hospitals for the child for examination and treatment. There are many reasons for children to have sudden convulsions while sleeping, in fact, in addition to the above two kinds of dehydration, fever, or even when the child has hypoglycemia may make the child have convulsions, in fact, no matter what the reason should be timely to the hospital for diagnosis and treatment.