Common causes of unexplained convulsions in children include pediatric epilepsy, hypocalcemia, and intracranial lesions. 1. Pediatric epilepsy: due to abnormal discharge of some neurons in the cerebral cortex. When a child has an epileptic seizure, it manifests itself as unexplained convulsions, foaming at the mouth, and rolling of the eyes. 2. Hypocalcemia: when a child is deficient in vitamin D, he or she is prone to hypocalcemia. A decrease in serum calcium levels can lead to increased neuromuscular excitability, which in turn manifests itself in unexplained convulsions and other symptoms. 3. Intracranial lesions: including craniocerebral injury, congenital developmental malformations, intracranial space-occupying lesions, etc., can cause abnormal brain discharges, which can lead to unexplained convulsions. All in all, when a child has symptoms of unexplained convulsions, it is recommended to go to a regular hospital in time to clarify the cause of the disease, and then targeted treatment.