Arachnoid cysts are a type of benign brain cyst. Patients with arachnoid cysts need to be looked at on a case-by-case basis, and different cases are treated differently. Small cysts do not require special treatment, while large cysts are more serious. If the cyst gradually increases in size, compression of blood vessels may lead to cerebral ischemic infarction and other conditions, and measures need to be taken as soon as possible to control the condition. Arachnoid cysts may also cause severe pain and even high cranial pressure if they compress the nerves. If it is complicated by an intracranial infection, there may also be a series of symptoms such as high fever, headache, and vomiting. All of these conditions require early surgery or symptomatic treatment. In addition, the speed of development of arachnoid cysts is also an orientation that determines the treatment method to be taken. If the disease of cysts develops slowly, conservative methods can be taken to treat them by lowering the cranial pressure and treating the original disease, or if the cysts grow faster, surgical methods can be considered for complete treatment, which can provide rapid relief of various symptoms. In conclusion, no matter what the cause of the arachnoid cyst is, surgery is the better choice if you want to cure it completely.