Arachnoid cysts usually do not cause dizziness, arachnoid cysts are congenital cystic tumors, and most patients are asymptomatic in clinical practice. However, if the arachnoid cyst grows rapidly and causes pressure on the brain parenchyma of the patient, the patient will experience intracranial space occupation and compression effects. Patients may experience severe headache, nausea, vomiting, and even limb convulsions and seizures. If the motor nerves are compressed, the patient will also have symptoms such as limb immobility or numbness of the limbs. Usually after treatment, the patient’s symptoms can be improved. If the arachnoid cyst is large, the patient’s symptoms can be improved by decompression, drainage, or removal of the cyst. If the arachnoid cyst has no clinical symptoms, the patient should not worry too much, regular review can be, in daily life should pay attention to the combination of work and rest, avoid fatigue, avoid mental stress.