Rectal Strictures: Causes and Treatment Options - Surgery

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External anal mass


I would like to ask the doctor, recently I have felt a firm, elongated lump on the left side of my anus (extending outward from the anal opening).
It is painful when I press on it, but there is no pain during bowel movements, and there are no abnormal discharges or ulcerations.
What could be the issue?

Xiao Wu, 40~49 year old female. Ask Date: 2021/12/02

Dr. Xu Kaixi reply Surgery


Based on your description, the perianal lump is difficult to diagnose.
It is recommended that you visit a surgical outpatient clinic for examination.

Reply Date: 2021/12/02

More Info


Rectal strictures are a narrowing of the rectum that can lead to various symptoms, including discomfort, pain, and difficulty with bowel movements. The presence of a hard lump on the left side of the anal area, especially if it is painful to the touch but does not cause pain during bowel movements, can be indicative of several potential issues.
One possible cause of the hard lump you are feeling could be a hemorrhoid, which is a swollen vein in the rectal area. Hemorrhoids can be internal or external, and while they often cause discomfort, they may not always be painful during bowel movements. Another possibility is the presence of a perianal abscess, which is a collection of pus that can occur due to infection. Abscesses can be painful and may feel hard to the touch.
Additionally, the lump could be a rectal polyp or a fibrous tissue growth, which may not cause pain during bowel movements but can be sensitive when pressed. In some cases, rectal strictures can be caused by inflammatory bowel diseases (IBD) such as Crohn's disease or ulcerative colitis, which can lead to scarring and narrowing of the rectum.
Given that you are experiencing pain upon pressing the lump but no pain during bowel movements, it is crucial to seek medical evaluation. A healthcare professional may perform a physical examination and possibly recommend imaging studies or a colonoscopy to visualize the rectum and identify the exact nature of the lump.
Treatment options for rectal strictures depend on the underlying cause. If the lump is determined to be a hemorrhoid, conservative treatments such as dietary changes, increased fiber intake, topical treatments, or even surgical options may be recommended. If it is an abscess, drainage may be necessary. For strictures caused by IBD, managing the underlying condition with medication or surgery may be required.

In summary, while the hard lump you are experiencing could be related to several conditions, it is essential to consult with a healthcare provider for an accurate diagnosis and appropriate treatment plan. Early intervention can help prevent complications and improve your overall health.

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