One side effect of chemotherapy is the possibility of hair loss, and if hair is lost, it usually grows back 2-3 months after all the chemotherapy is finished. It also depends on the patient’s nutritional status, if the nutritional status is better, it is possible that the hair may grow back in less than 2-3 months, 1-2 months, and the new growth may be better. In addition, not all drugs in chemotherapy cause severe hair loss reaction, some do not have hair loss reaction, such as pemetrexed hair loss reaction is not serious, mainly may be allergic reaction, and nausea, vomiting and other gastrointestinal reactions. Paclitaxel, docetaxel, a class of drugs, cause hair loss reaction is more serious, in the chemotherapy before you can cut your hair short, or use some of the ice cap method, can also alleviate the hair loss reaction. In addition, during chemotherapy, you should also elevate white blood cells, blood replenishment and other symptomatic treatment.