OK, the cyst did not rupture. Then what happens?
Well. If cyst doesn’t rupture, it usually resolves. That fluid inside the cyst is reabsorbed and the cyst collapses. However, if the cyst ruptures, it causes acute pain. The pain comes from irritation of peritoneum (lining of peritoneal cavity) with blood and cyst content. Why it is not painful when a regular follicle ruptures and releases the oocyte? Probably, a regular follicle is too small. In addition it doesn’t cause much bleeding. In contrast the cyst is a really big bubble (sometime 5-10 cm in diameter). If it ruptures, it instantaneously release bunch of special fluid. Plus, there is significant bleeding because there are a lot of blood vessels around to feed. Significant is of course relative. For example, take 5-10-20 ml of blood from a patient vein in a hospital daily. He complains about the pain from the needle mostly. But if you get the same 10 ml of blood into peritoneum… Wow. You will cry. There are plenty of nerve endings. Peritoneum is too touchy-feely. Tender. Besid
