Most ovarian cysts are small, non-cancerous (benign), and cause no symptoms. Some ovarian cysts cause problems which may include one or more of the following: 1  Pain or discomfort in the lower tummy (abdomen).2  The pain may be constant or intermittent. 3  Pain may only occur when you have sex.ost ovarian cysts are small, non-cancerous (benign), and cause no symptoms. Some ovarian cysts cause problems which may include one or more of the following: 1  Pain or discomfort in the lower tummy (abdomen).