Hi, Welcome To HCM & Thanks For Asking Your Query Here an Ovarian Cyst can cause Pain when passing a stool ,Pressure on the bowels , Bloating, swelling, or heaviness in the abdomen ,Pressure on the rectum or bladder and these may lead to constipation but blood in stool can not be caused by ovarian cyst itself , however severe constipation may lead to bleeding hemorrhoids inside your rectum and that leads to blood in stool For this You should see a gastroenterologist , he will examine your rectal area thoroughly to rule out the exact cause of blood in stool ,and will treat it accordingly , in most cases life style changes and diet along with medicines can relieve the condition , this includes increase fibers intake to avoid bloating and flatulence ,increase fluid intake, fruit and vegetables , exercise is also helpful I hope it help Thanks & Get well Soon