Initially your doctor will take a medical history and may ask detailed questions about your condition. This may be followed by a physical examination of your anus and rectum. To determine the cause of the disorder, a number of tests may be carried out:
- Anal manometry to check the strength of the anal sphincter muscles by inserting a small thin, flexible tube, with a small balloon at the end. This is inserted into the rectum via the anus. The balloon may be expanded to test the tightness, sensitivity and functioning of your sphincter muscles. 
- Anal electromyography to determine whether nerve damage is the reason behind the malfunctioning of sphincter muscles.  
- Proctosigmoidoscopy is a test in which the last two feet of the colon (sigmoid) are inspected for inflammation, tumour or scar tissues. This is done by inserting a flexible thin tube, with a camera attach at its end, into the rectum to view the linings of the bowel.  
- Proctography is a test in which the stool holding capacity of your bowel and stool expelling capability of your body is evaluated. An X-ray video is taken by releasing liquid barium into the rectum. 
- Anorectal ultrasound in which a small probe-like instrument is inserted into the rectum via the anus to produce video images that are studied by your doctor to evaluate the sphincter muscles’ structure. 
- Colonoscopy in which a flexible tube is inserted to check the entire colon. 
- Magnetic Resonance Imaging (MRI) to evaluate the pelvic organs by getting clearer images.