Asymptomatic left temporal lobe cysts in small children require only observation, and those with symptoms are treated with optimistic results and have a favorable long-term prognosis. Left temporal lobe cyst in children usually refers to arachnoid cyst in the left temporal lobe, which has a high clinical incidence but most patients do not have clinical manifestations. For children without clinical symptoms such as dizziness, headache, seizures, etc., they can be observed for the time being, and the cranial magnetic resonance imaging (MRI) should be repeated regularly as prescribed by the doctor. If symptoms appear, early medical attention is needed to prevent spontaneous rupture of the enlarged cyst, which can lead to intracranial hemorrhage and pressure on brain tissue. Surgery is usually required for this condition, and the specific treatment needs to be evaluated by the clinician. Arachnoid cyst fistula is the most common surgical procedure, and recovery is good. It is recommended that children with temporal lobe cysts should seek medical attention to avoid further aggravation.