If a woman has abnormal menstruation, it is recommended that she go to the hospital to perfect the examination, clarify what causes it, and then treat the cause. Common clinical examination methods are as follows: 1. Ultrasound examination of uterus and adnexa: When menstruation is abnormal, ultrasound examination can be performed by abdominal or negative type to clarify whether there is any abnormality in the endometrium and adnexa. Doctors can detect some common gynecological diseases under this examination, such as uterine fibroids, endometriosis, endometrial polyps, etc. Also, ovarian tumors can be detected, such as common chocolate cysts, It can also detect ovarian tumors, such as common chocolate cysts, mucinous cystadenomas, plasmacytic cystadenomas, etc. It can also detect fallopian tube problems; 2.Sex hormone six: sex hormone six is one of the common auxiliary examinations for reproductive endocrinology, which is clinically significant in determining the cause of amenorrhea, but the effects of hyperprolactinemia and oral contraceptives need to be excluded; 3.Routine examination of the white belt: routine examination of the white belt can detect common vaginal inflammation, and if serious vaginal inflammation is infected upstream to the If serious vaginal inflammation goes upstream to the uterine cavity, it may also cause abnormal menstruation, which needs to be checked to rule out if necessary. 4. Cervical cancer screening: Due to the general increase in the incidence of cervical cancer and its early age, it is recommended that women with persistent abnormal menstruation and sexual intercourse should undergo regular cervical cancer screening. Although cervical cancer does not technically cause irregular periods, its symptoms can manifest as vaginal bleeding and increased fluid discharge, which requires examination to identify with menstrual blood. These are the more common gynecological examinations. There are also some special gynecological examinations, such as MRI or CT examination of the pelvis, which can be used in special cases. In addition, excessive mental stress, irregular work and rest, and exposure to cold can also have an effect on the menstrual cycle, and attention needs to be paid to daily living habits.