Infantile spasms may be caused by cold, hypoglycemia, febrile convulsions, epilepsy, etc. and do not necessarily affect intelligence. When the disease damages the brain nerves, it may affect intelligence. 1. Cold: when cold, the body can maintain body temperature through the skeletal muscle trembling heat production, skeletal muscle contraction can be severe spasm. In this case, just increase the ambient temperature or take warming measures, the spasm will not affect intelligence. 2. Hypoglycemia: Hypoglycemia can cause sympathetic excitation through neurohumoral regulation, resulting in convulsions and spasms. At this time, the symptoms can be relieved by raising blood sugar through ingestion, and generally will not affect intelligence. 3. febrile convulsions: when infants have febrile convulsions, convulsions and spasms may occur. If the condition is serious or the treatment is not timely, it can cause nerve damage to the brain and affect intelligence. 4. Epilepsy: convulsive spasms are the main manifestation of epilepsy. When epilepsy medication is poorly controlled or frequent seizures, the brain can be ischemic and hypoxic and brain damage, which can affect intellectual development. There are other reasons for infants to have convulsions and spasms, and they should go to the hospital in time and follow the doctor’s instructions to choose the appropriate treatment to avoid serious consequences. It is recommended to use medication under the guidance of a doctor, not blindly self-medication, in order to avoid adverse effects.