Because the gamma knife is not a scalpel, the treatment must pay attention to the treatment must be washed before the treatment, because the gamma knife treatment will be given to the head on a frame, through the injection of steel nails fixed in the skull, the skin will have 3-4 needle eye that is the wound, and so the wound healing before you can wash your hair, generally instructed patients to wash before treatment is best, that is, first wash your hair. The whole process is painless, and the patient can easily complete, but after the treatment must be regularly reviewed and followed up, and not after the gamma knife is done everything is fine regardless of it. Some patients may not notice the tumor growing again after a few years, and the doctor does not recommend treatment in time, which may cause the tumor to recur. If the tumor is too big, open surgery must be done. There is another kind of precautions is infusion and dehydration after treatment. Some patients may have headache and dizziness, which may be caused by edema reaction, so if they have symptoms, they can be treated with infusion and dehydration at local hospital or at the hospital.