When you have just had your period and are bleeding again, it is often called a “return”. The bleeding time is relatively short, usually 1-21 days, and the amount of bleeding is not too much. The reasons for the return of bleeding are usually the following: 1. Psychological factors, such as excessive excitement, excitement, sadness, anxiety, longing, fear and other great psychological and emotional fluctuations during the menstrual cycle, resulting in endocrine disorders. 2. Gynecological diseases, such as celiac disease, cervicitis, vaginitis, cervical cancer, submucosal fibroids, etc., which can cause irregular vaginal bleeding. 3. Micronutrient deficiencies in the body 4. Stagnation of Qi and blood stasis can cause irregular vaginal bleeding due to weakness, poor menstrual flow and residual menstrual blood in the uterus after menstruation.