Large occipital pool cysts need to be judged on a case-by-case basis to determine whether treatment is needed. Generally there are no obvious symptoms, no special treatment, mainly conservative observation, if there are obvious symptoms, surgical treatment is required. If there are no clinical symptoms, just occasionally found when checking, generally conservative observation, no special treatment, occasionally can apply drugs, symptomatic treatment can be. If the large occipital pool cyst is relatively large, it may lead to increased intracranial pressure, which may cause headache and nausea in mild cases, and may cause impaired consciousness in severe cases. At this point, it produces obvious symptoms, with obvious pressure symptoms, and needs to be evaluated by a doctor to see if surgical treatment is appropriate.