Anal fissures are usually caused by trauma to the anal lining, most often from passing hard, large, or dry stools during constipation. Straining, chronic diarrhoea, and increased anal sphincter tension can also tear the delicate tissue. Understanding what causes anal fissures helps you prevent painful tears and heal faster. In this guide, we explain the main anal fissures causes, common risk factors, warning symptoms, and the treatment options available. You will also find simple prevention tips and when to see a specialist at Lux Hospitals for lasting relief.
What Is an Anal Fissure?
An anal fissure is a small tear or crack in the thin lining of the anal canal. It commonly causes sharp pain and bleeding during bowel movements.
Fissures can be acute (recent) or chronic (lasting over six weeks). Most heal with simple care, but some need medical treatment.
Key features to understand:
- A tear in the anal skin lining
- Causes sharp pain and bright-red bleeding
- Can be acute or chronic
- Very common and often treatable
- Different from an anal fistula or piles
Learn more about anal fissure care at Lux Hospitals.
1. Hard Stools and Constipation
The most common cause of anal fissures is passing hard, dry, or large stools. This overstretches and tears the delicate anal lining.
Ongoing chronic constipation keeps the area irritated, making tears more likely to recur. Low fibre and poor hydration worsen the problem.
Common triggers include:
- Low-fibre diet
- Not drinking enough water
- Ignoring the urge to go
- Sedentary lifestyle
- Certain medications causing constipation
Struggling with hard stools? Get expert help at Lux Hospitals.
2. Straining and Chronic Diarrhoea
Excessive straining during bowel movements puts pressure on the anal lining and can cause it to split. Prolonged sitting on the toilet adds to this strain.
Surprisingly, chronic diarrhoea can also cause fissures. Frequent loose stools irritate and inflame the sensitive tissue.
Strain-related causes include:
- Pushing hard during bowel movements
- Long periods sitting on the toilet
- Frequent watery stools
- Repeated wiping and irritation
- Untreated bowel conditions
3. Anal Sphincter Spasm and Tight Muscles
The internal anal sphincter can become too tight or go into spasm. This reduces blood flow to the area and prevents fissures from healing.
High resting muscle pressure creates a painful cycle. The tear causes pain, the pain triggers spasm, and the spasm blocks healing.
Muscle-related factors include:
- High anal sphincter tone
- Muscle spasm after a tear
- Reduced local blood supply
- Pain-spasm-pain cycle
- Delayed or incomplete healing
Persistent pain? Consult the fissure specialists at Lux Hospitals.
4. Childbirth and Pregnancy
Pregnancy and vaginal delivery increase the risk of anal fissures. Hormonal changes, constipation, and pressure during labour all play a role.
The strain of pushing during delivery can tear the anal lining. Many new mothers develop fissures in the postpartum period.
Contributing factors include:
- Constipation during pregnancy
- Straining during labour
- Increased pelvic pressure
- Hormonal changes affecting bowels
- Reduced activity after delivery
5. Other Medical Causes
Sometimes fissures result from underlying medical conditions rather than simple constipation. These need specialist evaluation.
Certain infections and inflammatory diseases weaken or damage the anal tissue.
Less common causes include:
- Inflammatory bowel disease (Crohn's)
- Ulcerative colitis
- Anal infections or STIs
- Previous anal surgery
- Rarely, anal cancer
Who Is at Risk of Anal Fissures?
Anal fissures can affect anyone, from infants to older adults. However, some groups face a higher risk.
Lifestyle habits and existing bowel problems strongly influence who develops fissures.
Higher-risk groups include:
- People with chronic constipation
- Pregnant and postpartum women
- Infants and young children
- Those with inflammatory bowel disease
- Older adults with poor circulation
- People with irritable bowel syndrome
Book a confidential evaluation with the experts at Lux Hospitals.
Symptoms to Watch For
Recognising fissure symptoms early helps you get faster relief. The signs are usually distinct and hard to ignore.
Sharp pain during and after bowel movements is the hallmark symptom.
Common symptoms include:
- Sharp pain when passing stool
- Bright-red blood on tissue
- Burning or itching around the anus
- A visible tear or skin tag
- Discomfort lasting hours after
How to Prevent Anal Fissures
Most anal fissures are preventable with simple lifestyle changes. The goal is soft, easy-to-pass stools.
Good bowel habits protect the delicate anal lining and reduce recurrence.
Helpful prevention tips include:
- Eat more fibre-rich foods
- Drink plenty of water daily
- Avoid straining on the toilet
- Don't delay the urge to go
- Stay physically active
- Treat constipation and diarrhoea early
Prevent painful tears—talk to the specialists at Lux Hospitals.
Treatment Options at Lux Hospitals
Many fissures heal with diet changes, stool softeners, and topical creams. Chronic or severe cases may need advanced care.
At Lux Hospitals, treatment is tailored to the cause and severity of your fissure.
Available options include:
- High-fibre diet and hydration
- Topical ointments to relax muscles
- Laser treatment for fissure healing
- Lateral internal sphincterotomy
- Fissurectomy surgery
- Anoplasty for chronic fissures
Explore lasting fissure relief at Lux Hospitals today.
Why Choose Lux Hospitals?
Lux Hospitals offers expert, compassionate care for anal fissures and related conditions. Our specialists focus on minimally invasive, proven treatments.
We address both the fissure and its underlying cause for lasting results.
What sets us apart:
- Experienced colorectal specialists
- Advanced laser and surgical options
- Personalised treatment plans
- Discreet, comfortable care
- Focus on long-term prevention
Conclusion
Anal fissures are most often caused by hard stools, straining, chronic constipation, and increased anal sphincter tension. Other causes include diarrhoea, childbirth, and underlying conditions like inflammatory bowel disease. The good news is that most fissures respond well to simple lifestyle changes and prompt treatment.
Eating more fibre, staying hydrated, and avoiding straining go a long way in preventing tears. If pain or bleeding persists beyond a few weeks, don't ignore it. Early evaluation prevents chronic fissures and complications. The experienced team at Lux Hospitals offers effective, discreet care—from topical therapy to advanced laser and surgical options—to help you heal fully and stay comfortable long term.
