What are the treatment options for an anal fissure?
For most people the tear (fissure) heals within a week or so, just like any other small cut or tear to the skin. Treatment aims to ease the pain and to keep the stools (faeces) soft whilst the fissure heals.
Easing pain and discomfort
- Warm baths are soothing and they may help the back passage (anus) to relax which may ease the pain.
- A cream or ointment that contains an anaesthetic such as lidocaine may help to ease the pain. You should only use this for short periods (up to 5-7 days). If you use it for longer, the anaesthetic may irritate or sensitise the skin around the anus. You can obtain one of these creams or ointments on prescription. You can also buy some of these products at pharmacies, without a prescription.The cream/ointment should be applied before going to the toilet.
- A cream or ointment that contains steroid medication may be prescribed by a doctor if there is a lot of swelling (inflammation) around the fissure. Steroids reduce inflammation and they may help to reduce any swelling around a fissure. This may help to ease any itch and pain. You should not use it for longer than one week at a time.
- Wash the anus carefully with water after you go to the toilet. Dry gently. Don't use soap whilst it is sore as it may cause irritation.
- Painkillers such as paracetamol or ibuprofen may help to ease the pain (but avoid codeine - see below).
Avoid constipation and keep the stools soft
- Eat plenty of fibre which is found in fruit, vegetables, cereals, wholemeal bread, etc.
- Have lots to drink. Adults should aim to drink at least two litres (10-12 cups) of fluid per day. You will pass much of the fluid as urine. However, some is passed out in the gut and softens the stools. Most sorts of drink will do; however, alcoholic drinks can lead to lack of fluid in the body (dehydration) and may not be so good.
- Fibre supplements and laxatives. If a high-fibre diet is not helping, you can take fibre supplements (bulking agents) such as ispaghula, methylcellulose, bran or sterculia. Methylcellulose also helps to soften stools directly, which makes them easier to pass. You can buy these at pharmacies or obtain them on prescription. A laxative such as lactulose or a macrogol laxative may sometimes be suggested.
- Toileting. Don't ignore the feeling of needing to pass stools. Some people suppress this feeling and put off going to the toilet until later. This may result in bigger and harder stools forming that are more difficult to pass later.
- Avoid painkillers that contain codeine, such as co-codamol, as they are a common cause of constipation. Paracetamol is preferable to ease the discomfort of a fissure.
Anal fissures in children
The above measures apply to children who have a fissure as much as to adults. In children, the pain often makes them hold on to their stools. This may lead to a vicious circle, as then even larger and harder stools form. These then cause more pain when they are finally passed. Therefore, in addition to the above measures, a short course of laxatives may be prescribed for children with an anal fissure. The aim is to make sure their stools are soft and loose whilst the fissure heals.
What if the anal fissure does not heal with the above measures?
An anal tear (fissure) will usually heal within 1-2 weeks in most people. However, it can take longer to heal in others.
Glyceryl trinitrate ointment
If you apply glyceryl trinitrate (GTN) ointment to the anus, it relaxes the muscle around the anus (the anal sphincter). It also increases the blood supply to the damaged skin by dilating the blood vessels in that area. This may allow the fissure to heal better. It may also ease the pain.
GTN ointment may help in some, but not all, cases. Research studies showed that, for people with a chronic anal fissure, about 6 in 10 fissures healed with GTN treatment. This compared to about 5 in 10 that healed with no treatment. So, the effect of GTN ointment is modest but may well be worth a try.
Some studies have shown that other medicines may also help to relax the anal sphincter muscle and increase the blood supply to the area, so helping healing of an anal fissure. For example, medicines called calcium-channel blockers, such as diltiazem. These medicines may sometimes be suggested for people unable to use GTN ointment.
An injection of botulinum toxin into the anal sphincter muscle has also been shown to relax the anal sphincter muscle and so help anal fissures to heal. This treatment may be suggested if other treatments have not been successful.
An operation is an option if the fissure fails to heal or comes back. The usual operation is to make a small cut in the muscle around the anus (internal sphincterotomy). This permanently reduces the tone (pressure) around the anus and allows the fissure to heal. This is a minor operation which is usually done as day case surgery (you will not usually have to stay overnight in the hospital). The success rate with surgery is very high. At least 9 in 10 cases are cured.
Did you find this information useful?
- Anal Fissure; NICE CKS, July 2016 (UK access only)
- Brown CJ, Dubreuil D, Santoro L, et al; Lateral internal sphincterotomy is superior to topical nitroglycerin for healing chronic anal fissure and does not compromise long-term fecal continence: six-year follow-up of a multicenter, randomized, controlled trial. Dis Colon Rectum. 2007 Apr 50(4):442-8.
- Mentes BB, Tezcaner T, Yilmaz U, et al; Results of lateral internal sphincterotomy for chronic anal fissure with particular reference to quality of life. Dis Colon Rectum. 2006 Jul 49(7):1045-51.
- Nelson RL, Thomas K, Morgan J, et al; Non surgical therapy for anal fissure. Cochrane Database Syst Rev. 2012 Feb 15 2:CD003431. doi: 10.1002/14651858.CD003431.pub3.
- Yiannakopoulou E; Botulinum toxin and anal fissure: efficacy and safety systematic review. Int J Colorectal Dis. 2012 Jan 27(1):1-9. doi: 10.1007/s00384-011-1286-5. Epub 2011 Aug 6.
- Samim M, Twigt B, Stoker L, et al; Topical diltiazem cream versus botulinum toxin a for the treatment of chronic anal fissure: a double-blind randomized clinical trial. Ann Surg. 2012 Jan 255(1):18-22. doi: 10.1097/SLA.0b013e318225178a.
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