Why does endometriosis hurt so bad?

Related questions

1. What does Stage 3 Endometriosis mean?
2. Is endometriosis similar to cancer?
3. What are the 4 stages of endometriosis?
4. Does endometriosis get worse?
5. Can you leave endometriosis untreated?
6. What are the different types of endometriosis?

Tags

1. #swell
2. #month
3. #during
4. #where
5. #tissue
6. #menstrual
7. #growths
8. #swelling
9. #lining
10. #inside
11. #uterus
12. #grows
13. #bleeds
14. #endometriosis
15. #period
16. #cause
17. #every
18. #cannot
19. #bleed
20. #because
21. #easily