Your doctor will take a full history and they will examine you. If you are female they will ask you about your experiences during childbirth. As part of the examination they will feel the pelvic floor and they may also ask you to squeeze your anus around their finger to assess how well the muscles in your anus are working.
Your doctor may refer you for an endoscopy. During an endoscopy, the inside of your rectum is examined using a long, thin flexible tube with a light and video camera at the end. Images can also be taken of the inside of your body.
He or she may also refer you for physiological analysis of the muscles of the bottom and pelvic floor:
Anal manometry uses a small probe which is passed into the anus and it assesses the muscles and nerves in and around your rectum.
Anal ultrasound uses an ultrasound probe which is used to detect damage to the sphincter muscles.
Defecating MRI proctogram: Water soluble x-ray dye is placed into your rectum. You will be asked to pass stools in the usual way while scans are taken.