This paper reports a case of intracranial hypertension after constriction of the sigmoid sinus. The patient, female, 24 years old, went to the doctor because of "pulsatile tinnitus in the left ear for more than 2 years". The preoperative CT of the temporal bone showed a diverticulum of the left sigmoid sinus. The left sigmoid sinus constriction was performed under general anesthesia. There was no obvious cause of nausea, vomiting, tinnitus and other discomforts for the first time. The follow-up visit was performed 1 month after the operation, and the papilledema was detected, which indicated that the intracranial pressure increased. After the administration of mannitol and other drugs, there was no obvious improvement, and another operation was performed to remove the tamponade. Discomfort disappears. After 10 months of follow-up, the tinnitus disappeared.