Bowel symptoms can be hard to explain and even harder to live with. You might be dealing with leakage, sudden urgency, constipation, straining, or the feeling that your bowel has not fully emptied. Some people know exactly where every toilet is before they leave the house. Others avoid long drives, social events, exercise, or work meetings because they are worried about accidents or discomfort.
If this sounds familiar, your doctor may recommend anorectal manometry. The name sounds technical, but the test itself has a simple purpose. It helps measure how well the muscles and nerves around the anus and rectum are working.
Anorectal manometry is commonly used for people with bowel control problems, constipation, difficulty emptying, or symptoms that suggest the lower bowel is not working as it should. It can form part of the care provided by a colorectal dysfunction testing clinic, particularly when symptoms need a clearer explanation before treatment is planned.
What Is Anorectal Manometry?
Anorectal manometry is a test that checks pressure, strength, sensation, and coordination in the anus and rectum. These parts of the body help you hold on when needed and empty your bowel when it is time to go.
The rectum stores stool before a bowel motion. The anus contains muscles that help keep stool and wind in until you are ready. For bowel function to work well, the muscles, nerves, and sensation in this area need to work together.
Anorectal manometry helps show whether the muscles are too weak, too tight, poorly coordinated, or not responding as expected. It can also check whether the rectum senses fullness normally.
Royal Prince Alfred Hospital explains that manometry measures the pressures generated by the anal sphincter muscles and may involve coughing or straining while pressures are measured. This helps specialists understand how well the muscles are responding. (slhd.nsw.gov.au)
Why Might You Need This Test?
Your GP or specialist may suggest anorectal manometry if you have ongoing bowel symptoms that have not been fully explained. These may include:
- Leaking stool
- Difficulty controlling wind
- Sudden urgency to open your bowels
- Constipation that does not improve with basic treatment
- Straining even when stool is soft
- Feeling blocked when trying to go
- A feeling that your bowel has not emptied properly
- Bowel symptoms after childbirth, surgery, injury, or illness
- Suspected pelvic floor coordination problems
Many bowel symptoms overlap. For example, leakage may be caused by weak muscles, loose stool, constipation with overflow, nerve changes, or poor sensation. Constipation may be caused by hard stool, slow bowel movement, or pelvic floor muscles that do not relax properly.
This is why testing can be helpful. It gives specialist colorectal doctors more information about what your body is doing, rather than relying on symptoms alone.
How Common Are Bowel Control Problems?
Bowel issues are more common than many people realise. Continence Health Australia reports that 1 in 30 people in Australia have experienced bowel incontinence, while 1 in 3 Australians over 15 experience some form of incontinence.
Among older adults, bowel control problems can be even more common. The Royal Australian College of General Practitioners notes that Australian and New Zealand data indicate faecal incontinence affects around 12–13% of older adults and up to 50% of people in residential aged care.
These figures are not included to alarm you. They are a reminder that bowel dysfunction is a real health issue, and you are not alone if you are seeking answers.
How Do You Prepare for Anorectal Manometry?
Preparation depends on the clinic and the reason for your test. Some people may be asked to use an enema before the appointment so the rectum is empty. Others may not need much preparation at all.
You may be asked about your symptoms, medications, allergies, previous surgeries, childbirth history, and bowel habits. It is helpful to tell the clinic if you have pain, anxiety, mobility issues, or anything that may make the test difficult.
Before the appointment, you may want to write down:
- How often you open your bowels
- Whether stool is usually hard, soft, loose, or mixed
- Whether you leak stool or wind
- Whether you feel urgency
- Whether you strain
- Whether you feel empty afterwards
- When symptoms started
- Any past childbirth injuries, pelvic surgery, bowel surgery, or spinal issues
You do not need to use medical language. Clear, honest details are enough.
What Happens During the Test?
Anorectal manometry is usually performed in a clinic or hospital setting. You will be taken to a private room and asked to lie on your side. The clinician will explain what is about to happen before the test begins.
A small, flexible tube is gently inserted into the anus and rectum. This tube is connected to equipment that measures pressure. It does not take pictures. It simply records how the muscles respond.
During the test, you may be asked to:
- Relax
- Squeeze as if trying to hold in wind
- Cough
- Push as if opening your bowels
- Tell the clinician when you feel pressure or fullness
Some tests include a small balloon at the end of the tube. This may be gently inflated to check rectal sensation. You may be asked when you first feel the balloon, when you feel the urge to go, and when the sensation feels stronger.
A patient information page from Sydney Colorectal Associates explains that a soft manometry catheter is placed inside the anus, and the patient is asked to squeeze and cough while pressures are measured on a computer.
Is Anorectal Manometry Painful?
Most people find the test unusual or mildly uncomfortable rather than painful. You may feel pressure, fullness, or the urge to open your bowels during parts of the test. These sensations are expected and usually settle quickly once the test is finished.
It is completely normal to feel embarrassed or nervous. However, the clinicians who perform anorectal physiology diagnostic services work with bowel symptoms regularly. Their role is to make the process as respectful, clear, and comfortable as possible.
You can ask questions before or during the test. If something hurts or feels too uncomfortable, tell the clinician.
How Long Does It Take?
The test itself is usually fairly quick. The appointment may take longer because of preparation, explanation, positioning, and time to answer questions. Some clinics may perform other anorectal tests during the same visit, depending on your referral.
These may include tests for sensation, nerve response, or anal sphincter structure. Your clinic should explain exactly what is planned before the appointment.
What Can the Test Show?
Anorectal manometry can help identify several possible causes of bowel dysfunction.
It may show that the anal sphincter muscles are weak, which can contribute to leakage or difficulty holding wind. It may show that the muscles do not relax properly when you try to empty your bowel, which can contribute to constipation or a blocked feeling.
It may also show changes in rectal sensation. Some people feel fullness too early, which can cause urgency. Others do not feel fullness soon enough, which can lead to leakage, constipation, or poor awareness of stool in the rectum.
The results can help explain why symptoms are happening and what type of treatment may be suitable.
What Happens After Anorectal Manometry?
After the test, you can usually return to normal activities unless your clinic gives you different instructions. Some people may feel mild temporary discomfort, but this usually settles quickly.
Your results will be reviewed by your treating doctor or specialist team. They may discuss whether your symptoms are linked to muscle weakness, nerve changes, poor coordination, altered sensation, constipation, or another bowel issue.
Depending on the findings, treatment may include:
- Pelvic floor physiotherapy
- Bowel habit training
- Biofeedback therapy
- Changes to fibre or fluid intake
- Medication to improve stool consistency
- Constipation treatment
- Further imaging
- Review with specialist colorectal doctors
- Surgery in selected cases
The test does not treat the problem by itself. Its value is in helping your care team choose the right direction.
When Should You Ask About Testing?
You may want to ask your GP or specialist about anorectal manometry if bowel symptoms are ongoing, affecting your confidence, or not improving with basic care. This includes faecal leakage, urgency, constipation, straining, difficulty emptying, or trouble controlling wind.
You should seek prompt medical advice if you have bleeding from the bowel, unexplained weight loss, black stools, severe pain, a sudden major change in bowel habits, or symptoms that wake you at night.
Bowel symptoms can feel private, but they are health concerns worth investigating. If you are dealing with ongoing bowel dysfunction, a colorectal dysfunction testing clinic that provides anorectal physiology diagnostic services can help find out what is happening and guide the next step in your care.