The indications for gamma knife therapy are tumors that do not tolerate surgery and are sensitive to radiation therapy. The treatment is safe, non-invasive and precise. Gamma Knife is a type of radiation therapy. The main principle is to use the gamma rays produced by cobalt-60 to act on the localization of the lesion, so that the lesion will atrophy under the irradiation of the rays and the function will be destroyed, so as to achieve the therapeutic purpose. Gamma Knife treatment requires precise localization of the lesion, usually with the help of CT and Magnetic Resonance Imaging (MRI), and later selecting the appropriate reference value according to the size and nature of the lesion. Gamma therapy is firstly for radiotherapy-sensitive tumors, if the tumor is sensitive to chemotherapy, poor radiotherapy will not meet the requirements. Secondly, because of the limitation of the gamma knife instrument design, the ray distribution is generally in the shape of a class of round, so it can achieve a better therapeutic effect on tumors with a class of round. And the gamma ray treatment is limited, so it is suitable for patients with small tumor size who cannot tolerate surgery. Gamma Knife treatment is relatively safe and precise as it usually kills the lesion only with little effect on normal tissues. Especially for tumors in the brain, the lesions can be removed without opening the skull, which has a better prognosis for patients. If you feel unwell, please go to the hospital in time for surgery and medication under the doctor’s guidance.