Leukopenia during lung cancer chemotherapy is caused by bone marrow suppression of lung cancer chemotherapy drugs. In fact, leukopenia during lung cancer chemotherapy may be accompanied by a decrease in platelets and red blood cells, but in general, leukopenia is more obvious. Leukopenia usually appears 1-2 weeks after lung cancer chemotherapy and often recovers 2-3 weeks after lung cancer chemotherapy. Leukocytes are the guard force against harmful bacteria and viruses that attack the body; therefore, leukopenia may cause stimulated infections, sometimes very serious. Therefore, special attention should be paid to leukopenia. During chemotherapy for lung cancer, you should check your blood routine regularly; avoid going to crowded public places, and also ask your family and friends not to visit too much, especially not to contact with people who have cold or fever; pay attention to any pain, ulcers and infections in your mouth, teeth, anus, etc., and report to your doctor immediately as soon as there is any situation; leukopenia leukocyte-lifting drug granulocyte colony-stimulating factor (G-CSF ) treatment, and herbal medicine can also help. Patients with leukopenia during lung cancer chemotherapy should also pay relative attention to their diet: 1. Patients undergoing lung cancer chemotherapy should eat more high-protein diet, mainly to improve the body’s resistance to provide the material basis for leukocyte recovery to normal. 2. 2. Patients undergoing chemotherapy for lung cancer should take a high vitamin diet, which can promote cell growth and development. Vitamins can promote the growth and development of cells and help differentiation and proliferation of white blood cells, which can lead to normalization. 3.Strict disinfection. At this time, patients are prone to complications of infection, so they should strictly sterilize food when making food and never eat raw, cold or unclean food. 4, should avoid eating persimmons, water chestnuts, betel nut, mint, mustard, raw radish, radish tassel, skull, bitter melon, kumquat and other products that consume qi and hurt the right; also avoid eating pepper, chili pepper, cinnamon, food cornelian, grass cardamom, wicker, and other spicy, warm and dry stimulating foods that hurt yin; also avoid eating raw melon, chrysanthemum, bananas, crabs, mussels, snails and other cold, damaging Yang, cold and spleen food.