Symptoms of Endometriosis
Endometriosis primarily presents with pelvic pain and infertility, with 90% of patients reporting pain symptoms including dysmenorrhea, deep dyspareunia, and chronic pelvic pain. 1
Core Pain Symptoms
The hallmark pain presentations fall into three distinct categories 2:
- Secondary dysmenorrhea - Pain that begins before menstrual onset and is severe in nature. Adolescents experience more severe dysmenorrhea with higher pain scores and longer duration compared to adults 3
- Deep dyspareunia - Pain with deep penetration during intercourse, characteristically worse during menses
- Sacral backache - Lower back pain specifically associated with menstruation
Chronic pelvic pain (CPP) is more common in adolescents and presents with distinct characteristics: adolescents describe it as "confined" and "oppressive," while adults report it as "widespread" 3.
Gastrointestinal Symptoms
Up to 90% of patients experience GI symptoms 4:
- Painful defecation during menstruation (dyschezia) - This is a key localizing symptom for deep infiltrating endometriosis 5
- Cyclic diarrhea or constipation
- Bloating and nausea - More frequent in adolescents 3
- "Endo belly" - Cyclic abdominal bloating during the second half of the menstrual cycle leading to menstruation, caused by elevated intestinal wall sensitivity 6
Urinary Symptoms
Cyclic urinary symptoms during menstruation including dysuria are characteristic 5. These symptoms specifically occur during menses, distinguishing them from other urologic conditions.
Reproductive Symptoms
Adolescent-Specific Presentations
Adolescents present with distinct patterns 3:
- Earlier age at menarche
- Longer menstrual periods requiring higher analgesic use
- More frequent headaches and nausea compared to adults
- Atypical symptoms that can delay diagnosis
Critical Clinical Correlation
The severity of pain correlates with the depth of endometriosis lesions, not the type or extent of lesions seen at laparoscopy 2. Painful lesions involve peritoneal surfaces innervated by peripheral spinal nerves rather than autonomic nerves.
Common Pitfall
The average diagnostic delay is 5-12 years after symptom onset, with most women consulting 3 or more clinicians before diagnosis 1. This occurs because symptoms are nonspecific and can mimic IBS (present in up to 52% of endometriosis patients) 4 and other conditions. Do not dismiss cyclic pain patterns or require normal imaging to exclude endometriosis - normal physical examination and imaging do not exclude the diagnosis 1.