Cervical canal adhesions, usually due to poor recovery from damage to the mucosa of the cervical canal, occur and narrow or occlude the cervical canal, mostly after abortion or physiotherapy for cervicitis, or in rare cases, congenital cervical canal adhesions. Regardless of the cause, cervical duct adhesions may present with periodic lower abdominal pain and may also be accompanied by menorrhagia and dysmenorrhea. Due to cervical canal adhesions, menstrual blood and shed endometrium cannot be discharged normally and are retained in the uterine cavity, thus showing periodic lower abdominal distension and pain due to the menstrual cycle, and in severe cases, even discomfort such as pallor, cold sweat and fever. For women with fertility needs, cervical canal adhesions can also cause infertility and require prompt medical examination. Cervical duct adhesions can be diagnosed by gynecological ultrasound or hysteroscopy. The main treatment at present is to surgically dilate the cervix of the uterus and then drain the trapped blood from the uterus. After separation, an intrauterine device needs to be placed for 3-6 months. Post-operative treatment is guided by the doctor, together with estrogen-assisted treatment and antibiotics to prevent infection.