Sedentary bring about classics blood to be entered upstream tubal, ovarian, cause next bellyacke, lumbago, have fierce classics especially painful, this namely alleged chocolate cyst.

• 久坐导致经血逆流入输卵管、卵巢，引起下腹痛、腰痛，尤其有厉害的经痛，此即所谓巧克力囊肿。