Gamma means gamma rays, which are electromagnetic waves with a short wavelength and are commonly used in the clinical treatment of tumors. Gamma rays are the short wavelength electromagnetic waves commonly used in the clinical treatment of tumors. The most commonly used method, gamma knife, uses gamma rays to carry out the treatment. Generally, gamma ray treatment can irradiate the parts that are not easy to operate or difficult to operate, and take stereotactic way to treat, such as intracranial tumors, which can be treated with gamma rays. Gamma ray treatment of tumors has unique advantages, the main treatment is convenient, and the time is as short as a few minutes to ten minutes. Safety is also relatively high, with patients experiencing no hair loss or other adverse effects after treatment. There is no restriction on eating and activities after the procedure. The treatment process is controlled by a computer, with precise efficacy and no damage to normal tissues. There are no obvious contraindications to surgery. Physical discomfort should be timely to the hospital, so as not to delay the condition.