Chemotherapy is a commonly used anti-tumor treatment. Some adverse reactions may occur in chemotherapy, but they are generally tolerable, as follows: 1. Gastrointestinal reactions: such as nausea and vomiting, serious ones may not be able to eat at all, in this case, antiemetic drugs need to be applied to relieve this pain. Not all patients have heavy nausea and vomiting reactions. If preventive measures are taken in advance and the patient’s nutritional status is relatively good, the patient can tolerate chemotherapy; 2. Myelosuppression: when there is a decrease in white blood cells and anemia, it is necessary to apply drugs to elevate white blood cells and replenish blood. Severe bone marrow suppression is more dangerous and may lead to infection, even shock, death, etc.; 3, hair loss: may make the patient feel more painful, should cut off the hair, wear a hat or wig in advance. Chemotherapy-induced hair loss after the end of chemotherapy, the nutritional status improves, hair will grow back, it is reversible, so chemotherapy must have confidence.