Chemotherapy generally refers to chemotherapy, chemotherapy hair loss will last about 1 month to stop, but due to the different conditions of each person, the time to stop hair loss can not be generalized. Chemotherapy is mainly used to kill cancer cells through chemical drugs to achieve the effect of cancer treatment, but while killing tumor cells, it will also kill the more vigorous cells, such as hair follicle cells, resulting in hair loss, which is a common adverse effect of chemotherapy. Usually, hair loss will stop after about 1 month, but if the patient’s condition is more serious and the chemotherapy treatment lasts for a longer period of time, the hair loss may last for a longer period of time before it stops, therefore, the time for chemotherapy to stop hair loss cannot be generalized. Patients are advised to follow the doctor’s advice and take active treatment to avoid delaying their condition.