Irregular bleeding mainly refers to irregular menstruation, i.e., irregular vaginal bleeding without obvious organic lesions of internal and external genitals, referred to as “dysmenorrhea”. However, if there are organic lesions of bleeding such as: 1, uterine fibroids; 2, uterine adenomyosis can cause irregular bleeding; 3, cervical polyps, cervical cancer, endometrial hyperplasia, polyps, endometrial cancer can also be vaginal irregular vaginal bleeding; 4, irregular bleeding after menopause. Women of childbearing age are more likely to consider pregnancy-related diseases, such as miscarriage, ectopic pregnancy, etc.; postmenopausal women are more likely to have malignant tumors. 5, ovulation bleeding occurs between two menstrual periods, lasts 3-4 days, blood volume is very small, consider ovulation bleeding. In conclusion, irregular vaginal bleeding is mostly related to uterine tumor, dysfunctional uterine bleeding, cervical lesions, bleeding during pregnancy and so on. Therefore, regardless of the cause of irregular bleeding, it is important to pay attention to it and seek medical treatment in time to give symptomatic treatment. Do not procrastinate in case the bleeding is severe enough to cause infection or secondary anemia.