Introduction
Pain, burning, or bleeding during bowel movements can be worrying and uncomfortable. One possible reason for these symptoms is an anal fissure, which is a small tear in the lining of the anus. Many people experiencing these symptoms often ask, what causes fissure?
Anal fissures can develop for several reasons, but one of the most common causes is passing hard or large stools. Constipation, repeated straining, and frequent bowel irritation can put pressure on the delicate anal lining and lead to a tear. In some cases, frequent diarrhea, childbirth, or underlying medical conditions may also contribute.
Understanding what causes an anal fissure is important because identifying the contributing factors can help support healing and reduce the risk of the fissure returning. While some fissures may improve with conservative care, persistent pain or bleeding should always be properly evaluated.
Dr. Trisha Rai specializes in the diagnosis and management of anal fissures and other colorectal conditions, helping patients understand the cause of their symptoms and receive appropriate treatment.
What Is an Anal Fissure
An anal fissure is a small tear or cut in the thin, sensitive lining of the anal canal. The condition can cause sharp pain during bowel movements, burning that may continue afterward, and sometimes a small amount of bright red blood on the stool or toilet paper.
A fissure can occur when the anal lining becomes stretched or damaged. In many cases, this happens because of changes in bowel movements, particularly when stools are hard, large, or difficult to pass.
However, not every fissure has the same cause. Understanding the possible factors can help determine the most suitable approach to treatment and prevention.
What Causes Fissure
Several factors can lead to the development of an anal fissure. The most common causes are related to constipation, hard stools, and repeated trauma to the anal lining.
Constipation
Constipation is one of the most common answers to the question, what causes fissure. When bowel movements become less frequent, stools can become hard and dry, making them more difficult to pass.
Passing a hard stool can stretch the anal canal and create a small tear in the lining. Repeated constipation can also prevent an existing fissure from healing because the area may be irritated again during future bowel movements.
Passing Hard or Large Stools
Even people who do not experience regular constipation can develop a fissure after passing an unusually hard or large stool.
The anal lining is delicate, and excessive stretching during a bowel movement can cause a tear. Once a fissure develops, the pain may make people afraid to pass stool, which can lead to further stool retention and worsen constipation.
Straining During Bowel Movements
Repeated straining increases pressure in the anal and rectal area. Trying to force a bowel movement, especially when constipated, can increase the risk of damaging the anal lining.
Avoiding unnecessary straining and focusing on keeping stools soft can help reduce irritation and support healthier bowel habits.
Chronic Diarrhea
Although hard stools are a common cause, frequent loose stools can also irritate the anal lining. Chronic or repeated diarrhea may lead to inflammation and increase the risk of developing a fissure.
People who experience persistent diarrhea should seek medical advice to identify and manage the underlying cause.
Repeated Irritation of the Anal Area
Frequent irritation or trauma to the anal region may contribute to fissures. This can happen due to repeated bowel problems, excessive wiping, or other factors that cause ongoing irritation to the sensitive skin and lining.
Maintaining good hygiene while avoiding harsh or excessive cleaning may help reduce unnecessary irritation.
Childbirth
Anal fissures can sometimes occur during or after childbirth because of the pressure and stretching involved during delivery.
Women who experience persistent anal pain or bleeding after childbirth should discuss their symptoms with a healthcare professional to determine the cause.
Increased Muscle Tension
After a fissure develops, the muscles around the anus may tighten or go into spasm because of pain. This increased tension can reduce blood flow to the affected area and make healing more difficult.
This can create a cycle where pain leads to muscle tightening, which may contribute to delayed healing.
Underlying Medical Conditions
In some cases, anal fissures may be associated with underlying conditions that cause inflammation or affect the digestive tract. Persistent, recurrent, or unusually located fissures may require further medical investigation.
This is one reason why people with ongoing fissure symptoms should avoid self-diagnosis and seek professional evaluation.
Common Symptoms of an Anal Fissure
Recognizing the symptoms can help you understand when to seek medical attention. Common symptoms may include:
- Sharp pain during bowel movements
- Burning or discomfort after passing stool
- Bright red blood on toilet paper or the surface of the stool
- A visible tear or crack around the anus
- A small lump or skin tag near a long-standing fissure
- Fear or difficulty passing stool because of pain
Symptoms can vary from person to person. Pain and bleeding in the anal area can also have causes other than an anal fissure, so a proper diagnosis is important.
Factors That Can Increase the Risk of Fissures
Certain habits and conditions may increase the likelihood of developing an anal fissure.
These include:
- A low-fibre diet
- Inadequate fluid intake
- Chronic constipation
- Frequent straining
- Regularly delaying bowel movements
- Persistent diarrhea
- Pregnancy and childbirth
- Conditions that affect the digestive system
Reducing these risk factors may help support better bowel health and lower the chances of repeated irritation.
How to Reduce the Risk of Anal Fissures
While not every fissure can be prevented, healthy bowel habits can help reduce the risk.
Eat Enough Fibre
Include fibre-rich foods such as fruits, vegetables, whole grains, beans, and legumes in your daily diet. Increase fibre gradually to avoid bloating or discomfort.
Stay Hydrated
Drinking adequate fluids can support digestion and help prevent stools from becoming excessively hard.
Avoid Straining
Do not force bowel movements. If you frequently need to strain, consider whether constipation or another digestive issue may be contributing.
Respond to the Urge to Pass Stool
Avoid regularly delaying bowel movements. Ignoring the urge can sometimes allow stools to become harder and more difficult to pass.
Stay Physically Active
Regular movement can support healthy digestion and may help reduce constipation.
When Should You See a Specialist
You should seek medical advice if you experience severe pain, repeated bleeding, persistent symptoms, or a fissure that does not improve with conservative care.
It is particularly important to seek evaluation if symptoms continue for several weeks or keep returning. Persistent fissures may require medical treatment beyond dietary and lifestyle changes.
Dr. Trisha Rai specializes in the diagnosis and management of anal fissures and other colorectal conditions. A proper consultation can help identify what causes fissure in your individual case and determine the most suitable treatment approach.
Conclusion
Understanding what causes fissure can help you take the right steps toward prevention and treatment. Constipation, hard or large stools, repeated straining, chronic diarrhea, irritation, childbirth, and certain underlying conditions can all contribute to the development of an anal fissure.
Maintaining healthy bowel habits, eating enough fibre, staying hydrated, and avoiding unnecessary straining may help reduce the risk of fissures and support healing.
However, persistent pain or bleeding should not be ignored. If your symptoms continue or keep returning, consult Dr. Trisha Rai for a proper diagnosis and personalized treatment plan based on your condition.