1. Infertility: About 50% of patients with endometriosis have infertility, and about 30-40% of patients with unexplained infertility suffer from endometriosis. Infertility in endo is often caused by pelvic masses, adhesions, poor follicular development or ovulation disorders caused by lesions; and once pregnant, ectopic endometrium is suppressed and atrophied, which is a good treatment for endo, and some cases of habitual abortion are caused by endometriosis. 2. Dysmenorrhea: The clinical feature of endometriosis is progressive dysmenorrhea, which is a common and prominent feature, mostly secondary, that is, since the occurrence of endometriosis, the patient complains that there was no pain at the time of menstruation in the past, but dysmenorrhea starts to appear from a certain period, which can occur before, during and after menstruation. The pain often increases with the menstrual cycle and disappears at the end of menstruation, but it is reported in China that about 21% of patients do not have dysmenorrhea. Periodic rectal irritation symptoms: Progressively increasing periodic rectal irritation symptoms are rare in other gynecological diseases, which is the most valuable symptom for diagnosing this disease. The rectum, anus and vulva are swollen, painful, and the feeling of urgency and increased frequency of stool. When the lesion is gradually aggravated, the symptoms become more and more obvious, while the symptoms disappear after menstruation. 4.Menstrual irregularities: Patients with endometriosis often have shortened menstrual cycle, increased menstrual volume or prolonged menstrual period, indicating that the patient has ovarian dysfunction performance. Irregular menstruation can be used as a diagnostic reference, but has no value in differential diagnosis. 5. Painful intercourse: painful intercourse can be produced when ectopic endometrial nodules, rectal recessed nodules or adhesions are present in the vaginal vault, or when ovarian adhesions are present in the pelvic floor. When fibroplasia and contraction of the posterior lobe of broad ligament lesions are obvious, they can exogenously compress the ureter and make it narrow and obstructed, and urinary symptoms may also occur, and in severe cases, ureteral effusion or hydronephrosis may occur. 6, periodic bladder irritation symptoms: when the endoheterosis lesion involves the bladder peritoneal reflexion or invades the bladder muscle layer, symptoms such as menstrual urgency and frequency of urination will occur at the same time. If the lesion invades the bladder mucosa (endometriosis of the bladder), there is periodic hematuria and pain. 7. Acute abdomen during menstruation or around menstruation: usually ovarian endometrial cysts with penetrating features. Most patients have emergency surgery for ovarian cyst torsion or ectopic pregnancy. If they get better without surgery, the pelvic adhesions will worsen and recurrent ruptures will occur in the future with acute abdomen. 8. Periodic lower abdominal discomfort: The occurrence of this symptom is higher than that of dysmenorrhea, and it is often present in patients with endometriosis without dysmenorrhea. It appears in patients with mild disease, or in some lesions that are more severe but do not produce dysmenorrhea symptoms but only menstrual back pain and lower abdominal cramping discomfort due to individual differences in pain threshold or other reasons. 9. Endometriosis in the scar of the abdominal wall and umbilicus presents with periodic localized masses and pain. 10. Patients with intrinsic endometriosis (adenomyosis) often have a distended uterus, but rarely exceed 3 months of pregnancy. In case of posterior uterus, adhesions are often fixed. 11. It is important to note that 1-2 or more small hard nodules, such as the size of a mung bean or soybean, are often palpable in the rectal fossa, uterosacral ligament, or posterior cervical wall, and are mostly painful to palpation and more obvious on anal examination. Ovarian cysts can grow to the size of a fist, and due to frequent spillage of cyst contents and ectopic endothelial bleeding, pelvic organ adhesions are aggravated into a frozen pelvic shape, which is known as extensive endoheterosis. The severity of the lesion varies greatly with the signs. Ultrasound sonogram: Ultrasound imaging is currently an effective method to assist in the diagnosis of endometriosis, and is mainly used to observe ovarian endometriotic cysts, which are characterized by: (1) cystic masses with clear or indistinct borders. If the cyst is heavily adherent around the cyst, the border is indistinct; if the cyst is less adherent to the uterus or surrounding tissues, the border is clear. The cysts are mostly of medium size and granular fine echogenicity is seen in the cysts, which is a manifestation of cystic fluid viscosity. Sometimes there are denser coarse light dot images in the form of mixed masses due to concentrated mechanization of old clots. (2) The mass is often located on the posterior side of the uterus, and concomitant cystic uterine syndrome is seen. (3) In case of spontaneous rupture of the cyst, the sonogram shows posterior depression and the cyst is smaller than before. (4) Laparoscopy: laparoscopy is currently the new standard for diagnosis of endometriosis. Through laparoscopy, the pelvic cavity can be directly visualized and a clear diagnosis can be made when ectopic lesions are seen, and clinical staging can be performed to determine the treatment plan.