What is the cause of ovulation pain? Recently have different type of pain in lower abdomen during period. History of removing endometriosis & cyst.

Mittelschmerz. ovulation pain (mittelschmerz) is cause by first the actual rupture of the cyst causing a sharp sudden pain with some residual discomfort afterwards. But many ovulated cysts will also bleed slightly and the blood irritates the perineum causing often a couple days of crampy to sharp pain. Endometriosis rarely goes away completely and pain with bleeding more likely that or adenomyosis.