Is This Lump Near My Anus Caused by an Anal Fistula? - Surgery

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Is this an external lump caused by an anal fistula?


Hello doctor, recently I have developed a lump in the upper right area of the anal cleft.
Initially, the lump felt like a small ball and was not visible on the surface.
After two months, it suddenly grew larger and is painful when pressed, but I don't feel anything when standing.
When I touch the lump, I can feel a tubular connection to it.
I have already visited a dermatologist for excision and am waiting for the report.
I would like to ask if this lump could possibly be located at the external opening of a fistula.

Xin, 30~39 year old female. Ask Date: 2022/03/17

Dr. Chen Bingze reply Surgery


Hello, it would be better to visit a nearby surgical clinic or hospital outpatient department for a more accurate assessment.

Reply Date: 2022/03/17

More Info


The lump you are describing near your anus could potentially be related to an anal fistula, but there are several factors to consider before arriving at a definitive conclusion. An anal fistula is an abnormal connection between the anal canal and the skin surrounding the anus, often resulting from an infection or abscess in the anal glands. The presence of a lump that has grown over time, is painful upon pressure, and has a tubular connection could indeed suggest the possibility of a fistula, especially if there is a history of anal abscess or infection.

However, it is essential to recognize that not all lumps in the anal region are indicative of an anal fistula. Other conditions that can present similarly include:
1. Anal Abscess: This is a collection of pus that can form near the anus, often due to infection. An abscess can lead to the formation of a fistula if it does not heal properly.

2. Hemorrhoids: Swollen blood vessels in the rectal area can sometimes feel like lumps and can be painful, especially when inflamed.

3. Skin Tags: These are benign growths that can occur around the anus and may be mistaken for more serious conditions.

4. Other Tumors: Although less common, tumors in the anal region can also present as lumps and should be evaluated.

Given that you have already consulted a dermatologist and are awaiting pathology results, it is crucial to follow up with your healthcare provider regarding the findings. The results will help clarify the nature of the lump and guide further management. If the pathology report indicates that it is indeed a fistula or another condition, your doctor will discuss the appropriate treatment options with you.

In the meantime, here are some general recommendations:
- Avoid Straining: If you experience discomfort during bowel movements, try to avoid straining, as this can exacerbate symptoms.

- Maintain Hygiene: Keeping the area clean can help prevent infections. Gentle cleansing with warm water is usually recommended.

- Monitor Symptoms: Keep track of any changes in the lump, such as increased size, changes in color, or the development of additional symptoms like fever or increased pain.

- Follow-Up Care: Ensure you have a follow-up appointment scheduled to discuss the pathology results and any necessary next steps.

In conclusion, while the characteristics of the lump you described could suggest an anal fistula, it is essential to await the results of your biopsy and to continue working closely with your healthcare provider. They will be able to provide a more accurate diagnosis and appropriate treatment based on the findings. If you experience worsening symptoms or new concerns arise, do not hesitate to seek medical attention promptly.

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