Abstract: In recent years，there is an upward trend incidence of adolescence endometriosis. It has been discovered to be a challenging problem in gynaecology. Although the pain may start at a young age，even before the onset of menstruation，the diagnosis by laparoscopy is almost always postponed for several years，by which time destructive lesions have affected the tubo-ovarian structures and severely compromised. There are many reasons, the most important reason is the diagnostic delay. Therefore，laparoscopic biopsy is a gold standard for diagnosis of adolescent endometriosis． Transvaginal ultrasounds and transvaginal access with a less invasive needle endoscopy are recommended for exploration of the pelvis. Diagnosis of endometriosis and treatment at an early stage before severe lesions develop. Treated at the same time by laparoscopy，postoperative adjuvant drug treatment can reduce relapse until the completion of childbearing．

Key words: Puberty, Endometriosis, Diagnosis, Therapy