Chemotherapy for cancer is painful, mainly in the form of gastrointestinal reactions such as nausea and vomiting, some chemotherapy drugs can cause hair loss, others can cause complications such as numbness in the hands and feet, and a few drugs can cause kidney function damage. In short, all chemotherapy drugs have some damage or toxicity to people. Chemotherapy is the main treatment for cancer treatment, especially for diseases that can be cured by chemotherapy such as leukemia and lymphoma, chemotherapy is essential. Some diseases, such as lung cancer, breast cancer, colorectal cancer, after surgery, depending on the condition, chemotherapy is also needed as one of the adjuvant treatments after surgery in order to prevent recurrence and reduce distant metastasis. Therefore, the pros and cons of chemotherapy must be weighed, and if the pros outweigh the cons, the side effects of chemotherapy need to be overcome. Of course, there are currently measures to deal with the side effects of chemotherapy drugs, such as anti-nausea and hair loss. The side effects of chemotherapy are far less than before, so chemotherapy can be implemented boldly.