Common adverse reactions and treatment during chemotherapy: 1, nausea, vomiting should try to alleviate the ideological concerns, relax. During chemotherapy, if there is gastrointestinal discomfort, you can eat a little light liquid diet, avoid eating too sweet, greasy, spicy, stimulating food, eat less and more meals, can be appropriate before and after meals, walk, do some activities to increase appetite. If vomiting occurs when you are in bed, you should lie on your side to prevent accidental aspiration, rinse your mouth after vomiting, and pay attention to the amount and nature of vomiting. 2. abdominal pain and diarrhea Pay attention to the nature of abdominal pain and diarrhea, and report to the doctor promptly if there are abnormalities such as dark colored stools and blood. You should eat soft food, less residue, low fiber, non-irritating food, and pay attention to dietary hygiene. Drink more water to replace the water lost from diarrhea. If necessary, you can take oral medicine “rectify intestine” “easy to stop” to control the symptoms. 3, constipation side effects of chemotherapy drugs, reduced food, lack of activity and mental tension and other reasons can cause constipation. You can do proper activities, adjust your mood, eat more fiber-rich food and drink more water. If there is no bowel movement for more than 3 days, laxatives such as castor oil, liquid paraffin, etc. can be used. 4. Pay attention to oral hygiene for mouth ulcers, refrain from smoking and alcohol, brush and rinse your teeth after meals and before bed every day, and report to your doctor if you have severe pain from mouth ulcers. Hair loss is a reversible reaction, and hair can be regenerated after chemotherapy is finished, and an ice cap can be placed on the head before chemotherapy, and removed 10 minutes after the drug is finished to reduce hair loss. 6. Patients should also pay attention to rest, strengthen nutrition, keep the air fresh, and prohibit contact with patients with infectious diseases to prevent cross-infection.