An anal fissure is a small tear or crack in the lining of the anal canal. It most commonly develops when passing hard, dry, or large stools during bowel movements. Anal fissures can occur at any age but are more common in adults.

Common causes include:

Chronic constipation and straining
Passing hard or bulky stools
Muscle spasms in the anal sphincter
Injury or trauma to the anal area
Haemorrhoids
Underlying digestive disorders such as Crohn’s disease, irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), or colitis

Symptoms of an Anal Fissure

Symptoms can vary in severity and may include:

Sharp or burning pain during or after bowel movements
Itching or irritation around the anus
Bright red blood on the stool or toilet paper
A visible tear in the anal skin

Most acute anal fissures heal naturally within a few weeks. However, if fissures recur frequently or become chronic, medical advice should be sought. Repeated injury or infection can increase the risk of further bowel complications.

Diet Tips for Anal Fissures

Diet plays a crucial role in preventing constipation and supporting healing.

Stay well hydrated: Drink at least 2 litres of water daily to prevent stools from becoming hard and dry.
Start the day with warm lemon water: A warm glass of water with the juice of half a lemon juice can stimulate digestion and bowel movement. Lemon may help cleanse the bowel lining and encourage peristalsis.
Reduce red meat intake: Red meat and connective tissue slow bowel transit time and may worsen constipation.
Increase fruit and vegetables: Raw fruits and vegetables help soften stools, increase fibre, and support bowel health. Soothing (demulcent) foods include papaya, bananas, pineapple, apples, beetroots, and lemons.

Lifestyle Factors That Support Healing

Prevent constipation: Regular bowel movements reduce strain and allow the fissure to heal.
Avoid enemas and colonic irrigation: During an acute fissure, these may further damage sensitive tissue.
Do not strain during bowel movements: Avoid prolonged sitting or pushing on the toilet.
Exercise regularly: Physical activity helps stimulate healthy bowel movement and digestion.

Natural Remedies for Anal Fissures

Internal Support

Stool softeners: Natural options include aloe vera juice, slippery elm powder, and oats (porridge).
Adequate fibre intake: Fibre supports regular bowel movements. Psyllium husks may be taken at night with a large glass of water. Ensure you are well hydrated when using psyllium.
Probiotics: These may help rebalance gut bacteria and improve digestive health.
Bowel-healing nutrients: A combination of slippery elm powder, zinc liquid, glutamine powder, and probiotics may help strengthen the bowel lining and soothe irritation. Mix in water or apple juice and take twice daily, 10 minutes before meals, for 3–4 months.
Aloe vera juice: Provides gentle laxative action, reduces inflammation, softens stools, and soothes irritated tissue.
Fish oil: Helps lubricate the bowel and provides anti-inflammatory benefits.

Digestive and Liver Support

If digestive or liver function contributes to constipation, certain herbs may be helpful, including:

Milk thistle (St Mary’s thistle)
Dandelion
Bupleurum
Schisandra
Gentian
Meadowsweet
Cardamom
Agrimony
Goldenseal (supports wound healing)
Cinnamon, rhubarb, and atractylodes

Topical Relief

Applying soothing ointments may reduce discomfort and support tissue repair. Ingredients to look for include:

Arnica
Calendula
Witch hazel
Goldenseal
Manuka honey

Additional Nutrients

Vitamin C and bioflavonoids: These antioxidants may support bowel movement, reduce inflammation, improve circulation, and assist tissue healing.

While many anal fissures heal naturally with proper diet and lifestyle changes, persistent or severe symptoms should always be assessed by a healthcare professional to rule out underlying conditions.

What Is an Anal Fissure? Causes, Symptoms, and Natural Management