Through effective chemotherapy, the tumor can usually be shrunk and can also disappear in some patients. Chemotherapy can inhibit the growth of tumor cell division through chemical drugs, and at the same time, it can also effectively kill the tumor cells, so as to achieve the purpose of making the tumor shrink or even disappear. This method can be administered orally or intravenously, and is a more common treatment for malignant tumors in the clinic. When conducting chemotherapy, one should choose the appropriate chemotherapy method according to one’s own condition in order to effectively achieve the purpose of treating malignant tumors. There are certain adverse reactions when chemotherapy is administered. For example, some patients will cause strong nausea, abdominal pain, diarrhea and other symptoms. Some patients also experience hair loss and intense headaches. Patients who experience adverse reactions after chemotherapy should seek prompt medical attention.