Consider convulsions in a three-month-old baby who is rigid and needs to be alert for intracranial infections, intracranial space-occupying lesions, or neurologic abnormalities such as epilepsy. Neurologic signs such as fontanel tone and the presence of a cervical block can be observed to assist in the diagnosis. When the baby appears to be hard, or accompanied by double staring, limb shaking, etc., need to consider the convulsive seizure, need to go to the hospital in time, close observation of consciousness, pupil and vital signs changes, pay attention to record the specific performance of the convulsive seizure, pay attention to protection, avoid accidental injury, keep the head to one side tilt, maintain a clear airway, avoid choking and misinhalation, if necessary, give oxygen. In addition, because midazolam intramuscular injection has a very good effect of stopping the convulsions, and the operation is simple and fast, if the baby is considered convulsive seizures, can follow the doctor’s instructions preferred midazolam for stopping the convulsions. Intracranial infection, intracranial space-occupying lesions, or epilepsy and other diseases can lead to the occurrence of convulsions, it is recommended to improve the cranial brain magnetic resonance, cerebrospinal fluid examination and electroencephalogram examination, a clear diagnosis, according to the cause of targeted treatment.