Arachnoid cysts once in a while dizziness, the normal life does not affect the case, you can not need surgery, conservative treatment, continue to observe can. Arachnoid cyst is a congenital disease. Generally, arachnoid cysts seldom present clinical symptoms, or only occasional dizziness, headache, etc. In this case, you can usually choose to continue conservative treatment, regular review, if the arachnoid cysts do not continue to increase in size, regular review can be enough, no need for surgery. If the dizziness caused by arachnoid cysts increases in frequency, or the dizziness and headache symptoms worsen, then timely surgery should be chosen to relieve the pressure of the cysts on the brain tissue and to prevent the cysts from rupturing when they increase in size.