If you have irregular menstruation, you can see the endocrinology department of the gynecology department. Most of the irregular menstruation is caused by endocrine abnormality. It is best to go to the gynecology department on the 2nd or 3rd day of menstruation for examination, mainly to know the endocrine condition, such as blood test for sex hormone 6 and blood test for thyroid function to know the endocrine condition. In addition, it is also necessary to go for gynecological examination once, mainly in 3-7 days after menstruation, and need to do corresponding gynecological examination to know whether there is any abnormality of vulva, vagina, cervix, and also need to do gynecological examination to know whether there is any pressure and pain in uterine adnexa, whether there is pelvic inflammation, etc. It may be necessary to go twice to do the corresponding examination in clinic, so that a diagnosis can be made and then treatment can be given.