How long does a thicker endometrium need to be regulated by herbal medicine cannot be generalized, but is mostly related to the patient’s specific condition as well as personal psychological and physical factors. Thick endometrium means that the thickness of endometrium exceeds the normal range, which may be a normal physiological change or a manifestation of various diseases, such as ovarian insufficiency and disorder, endometritis, early stage of endometrial cancer, endocrine functional tumor, etc., all of which may manifest as thickened endometrium. Therefore, when taking Chinese medicine for conditioning, if the patient’s condition is mild, the conditioning time may be shorter, 1-3 months or longer will have certain effect. However, if the endometrial thickening is caused by a more serious disease, the conditioning time may be longer, and the specific conditioning time should be determined by the doctor according to the patient’s specific condition regression. In addition, endometrial thickening may also be affected by obesity and psycho-emotional factors, so patients are advised to maintain a good psychological state on a daily basis and to increase exercise and control their weight in order to promote recovery.