Chemotherapy for lung cancer is what is going on involving the three conventional means of tumor treatment, including surgery, radiotherapy and chemotherapy, and now the newly advanced immunotherapy and targeted therapy. Chemotherapy kills tumor cells by inputting chemical drugs with cytotoxic effect, but this process may damage normal cells, so patients will have some side effects after lung cancer chemotherapy, such as gastrointestinal side effects, including nausea, vomiting, abdominal pain, diarrhea; some patients have hair loss; some feel numbness of fingers, which are all symptoms of damage to normal tissues caused by chemotherapy drugs. These are all signs of damage to normal tissues caused by chemotherapy drugs. Nowadays, there are some good adjuvant treatments for chemotherapy, such as gastric protection and antiemetic, which can appropriately reduce these symptoms in patients. Some of the reactions caused by chemotherapy are transient, not continuous, and these symptoms will gradually decrease or disappear as the drugs are discharged. The hair will also grow out slowly with the completion of chemotherapy, so you can not worry too much.