One of the side effects of chemotherapy is hair loss. For example, the commonly used paclitaxel drugs have a heavy hair loss reaction, and it is possible to lose hair after one chemotherapy session. However, it is not certain that all patients will have a hair loss reaction to paclitaxel or other chemotherapy drugs. Some people do not have a severe reaction and may lose their hair after 2-3 treatments. Of course, there are drugs that do not cause heavy hair loss reactions, such as the application of gemcitabine, fluorouracil and other regimens, the chemotherapy response is not too big, and does not cause a more obvious hair loss reaction. Chemotherapy-induced hair loss reaction is reversible, that is, after a period of recuperation, nutritional enhancement of the hair will grow back again, and the hair that grows back may be better. So don’t be too nervous and make sure to cooperate with chemotherapy.