The severity of left temporal lobe tumors needs to be analyzed on a case-by-case basis. The severity of temporal lobe tumors can be related to factors such as the nature and location of the tumor. If the temporal lobe tumor is benign tumor such as meningioma, etc., and the location is shallow, most of the conditions are relatively not serious. If the temporal lobe tumor is a malignant tumor such as glioma, etc., or the location of the tumor is deeper or adjacent to important blood vessels, etc., the condition of the tumor is usually relatively serious. Even if craniotomy is taken, it is difficult to remove it completely. Some patients’ tumors may also recur after surgery, requiring further comprehensive treatment such as radiotherapy and chemotherapy. If left temporal lobe tumor is found, one should seek medical treatment in time and actively treat it under the guidance of doctor to avoid delaying the condition and causing serious consequences.