Side effects of radiotherapy for brainstem tumors. In addition to the common complications of radiotherapy, such as hair loss, local skin damage, bone marrow suppression, gastrointestinal symptoms, the specific manifestation is the edema of brain tissue after radiotherapy, which may lead to motor sensory disorders, swallowing difficulties, hearing loss, hoarseness, balance disorders, even mental abnormalities, consciousness disorders, cranial hypertension and brain herniation in the late stage. In addition to the above, there are many other side effects of radiotherapy. In order to reduce the probability of side effects, it is recommended that patients should use some drugs to suppress side effects during radiotherapy, and at the same time, they should develop a healthy lifestyle, maintain a regular diet and rest, and improve their body immunity.