Hair growth during chemotherapy for tumors is normal, but rare. Generally hair loss is a common side effect of chemotherapy. So it is better to grow hair during chemotherapy than to lose hair. When chemotherapy kills tumor cells, it also damages normal cells of the body, especially hematopoietic cells of bone marrow, gastrointestinal mucosal cells and hair follicle cells. Therefore, bone marrow suppression and hair loss are the most common adverse reactions in patients using chemotherapy drugs. If hair growth occurs during chemotherapy, it means that the destructive effect of chemotherapy drugs on hair follicle cells is very mild. Don’t be too alarmed if hair loss occurs when you are killed or injured, it will not harm the body’s function, and your hair can still grow when the chemotherapy is over. Bone marrow inhibition such as decreased hematopoietic function of human bone marrow, decreased white blood cells, decreased platelets, and severe anemia can affect life due to dangerous complications such as infection or bleeding. Chemotherapy combined with Chinese medicine can be regarded as a comprehensive treatment to inhibit or eliminate tumors, reduce side effects, enhance efficacy, and improve body immunity, which can achieve better therapeutic effects. The best results can be achieved by regular monitoring and review during chemotherapy, maintaining a good mindset, building confidence in overcoming the disease, improving body immunity, and reducing the side effects of chemotherapy.