This is not a substitute for direct care by YOUR doctor. Confirm with your doctor before doing any of the following.

 There are multiple different tests that are specifically used for pelvic floor evaluations. If you have a change in your bowel habits, the first step is to make sure that have undergone a colonoscopy recently to rule out cancer or precancerous conditions.  Once that is completed, the next step is evaluating your pelvic floor function and anatomy. A digital rectal exam and anoscopy can provide a lot of the information your doctor needs to make a diagnosis and to treat the issue. If more information is needed, then the tests listed below can provide more information.

Defecography

Defecography is a test done either with MRI or xrays to evaluate your pelvic floor muscles as you attempt to evacuate contrast from your rectum. To put this more simply, contrast is placed into your rectum by a radiology technician and you poop out the contrast in the MRI machine or in front of an xray. In women sometimes, contrast is also put into the vagina to evaluate this area at the same time. It sounds very strange, but it can provide a lot of helpful information for both diagnosing the problem and treating it.

 MRI Defecography Test: Purpose, Procedure & What to Expect 

 MR defecating proctography | Radiology Reference Article | Radiopaedia.org 

Anorectal Manometry

Anorectal manometry measures how strong the muscles in the rectum are, how well they work to help you poop, and how well they work to hold in poop. A lubricated device about the size of a finger is inserted into your rectum. During the test, you will be instructed to squeeze, relax, and then bear down like you are having a bowel movement. A balloon test is frequently done at the same appointment. This is when a small medical balloon is placed into your rectum and you are instructed to push it out. If you cannot push out the balloon, it is removed.

 Anorectal manometry: what it is used for and how it is performed - THDLAB - COM | THD 

Endoanal Ultrasound

This is an ultrasound done with a special probe that is inserted into your rectum. For pelvic floor patients, this is used to evaluate if there is an injury to the sphincter muscle. If there is an injury, it can be used to evaluate the size of the injury.

 Endoanal Ultrasound of Pelvic Floor | Radiology Key 

 Current update on the role of endoanal ultrasound: a primer for radiologists | Abdominal Radiology 

1. Diet: The first step in treatment is usually adding fiber to your diet. This helps "bulk" your stool. Stool that is too loose or too hard is much harder for your body to process than soft stool. 
2. Physical Therapy: Pelvic floor physical therapy with biofeedback can be very helpful for a lot of patients.
3. Surgery: If there is an anatomic problem (e.g. rectal prolapse), sometimes this must be fixed before making any progress. 
4. Botox: If some of the muscles in the pelvic floor or sphincter are too tight, then treatment with Botox may be indicated.
5. Sacral Nerve Stimulator: This is an implantable device that helps 80-90% of patients significantly reduce the amount of fecal incontinence they experience.  Sacral Nerve Stimulation: Implant, Procedure & Side Effects 

 Management of Fecal Incontinence (2023) | ASCRS Toolkit - FREE Resources 

 Clinical Practice Guidelines (CPGs) - APTA Pelvic Health 

 Pelvic Floor Dysfunction - StatPearls - NCBI Bookshelf