Anal Muscle Tension During Bowel Movements - Gastroenterology and Hepatology

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Inability to relax the anal muscles during defecation?


Hello, doctor.
Previously, I could easily pass stool with some effort, but for the past month, even with significant straining, I feel that the muscles around my anus have become very tight, and the opening has narrowed, resulting in a much smaller amount of stool being expelled compared to before.
However, the stool that does come out is still soft and not hard.
What could be causing this?

AAA, 20~29 year old female. Ask Date: 2011/09/12

Dr. Chen Qifeng reply Gastroenterology and Hepatology


Hello: This is likely caused by impaired intestinal function.
It is recommended to have a light diet, low in oil and dairy.
If there is no improvement, please consult a colorectal specialist.
Wishing you good health, Dr.
Chen Qi-feng, Taoyuan Hospital, Department of Health.

Reply Date: 2011/09/12

More Info


Understanding anal muscle tension during bowel movements can be quite complex, as it involves various physiological and psychological factors. Based on your description, it seems that you are experiencing increased tension in the anal sphincter muscles during bowel movements, which is affecting your ability to pass stool effectively. This condition can be attributed to several potential causes, and understanding these can help guide you toward appropriate management.

Firstly, it is important to recognize that the anal sphincter muscles play a crucial role in controlling bowel movements. These muscles can become tense or hypertonic due to various reasons, including stress, anxiety, or even changes in bowel habits. When you experience stress or anxiety, your body may respond by tensing up, which can include the muscles around the anus. This tension can create a sensation of tightness, making it difficult to relax the muscles necessary for a smooth bowel movement.

Another potential factor could be related to your diet and hydration status. While you mentioned that your stools are still soft and moist, it is essential to ensure that you are consuming enough fiber and fluids. A diet low in fiber can lead to changes in bowel habits and may contribute to the sensation of incomplete evacuation or difficulty in passing stool. Even if the stool consistency remains soft, if the volume is reduced, it may indicate that your body is not processing food as efficiently as before.

Additionally, certain medical conditions can lead to increased anal muscle tension. Conditions such as anal fissures, hemorrhoids, or pelvic floor dysfunction can cause discomfort and lead to a reflexive tightening of the anal sphincter muscles. If you have experienced any pain during bowel movements or have noticed any bleeding, it is crucial to consult a healthcare professional for a thorough evaluation.

Psychological factors, such as anxiety about bowel movements or a history of constipation, can also contribute to muscle tension. If you have previously experienced discomfort or difficulty during bowel movements, you may subconsciously tense your muscles in anticipation of pain, creating a cycle of tension and difficulty.

To address this issue, consider the following recommendations:
1. Relaxation Techniques: Incorporate relaxation techniques such as deep breathing, meditation, or gentle yoga to help reduce overall muscle tension. These practices can help you become more aware of your body and promote relaxation during bowel movements.

2. Dietary Adjustments: Ensure that you are consuming a balanced diet rich in fiber, including fruits, vegetables, whole grains, and legumes. Adequate hydration is also essential to maintain soft stools and promote regular bowel movements.

3. Pelvic Floor Exercises: Engaging in pelvic floor exercises, such as Kegel exercises, can help you learn to control and relax the anal sphincter muscles. A physical therapist specializing in pelvic floor dysfunction can provide guidance on proper techniques.

4. Mindfulness During Bowel Movements: When you feel the urge to have a bowel movement, take your time and allow yourself to relax. Avoid straining, and instead focus on breathing and gently allowing the stool to pass.

5. Consult a Healthcare Professional: If the issue persists or worsens, it is advisable to consult a healthcare provider. They can perform a thorough evaluation, including a physical examination, and may recommend further tests or treatments based on your specific situation.

In summary, increased anal muscle tension during bowel movements can result from a combination of physiological and psychological factors. By addressing these factors through relaxation techniques, dietary adjustments, and possibly seeking professional guidance, you can work towards alleviating the tension and improving your bowel health.

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