Anal Abscesses: Symptoms, Causes, and When to Seek Help - Surgery

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Anal abscess


In recent years, I have occasionally noticed a lump on my buttocks in different locations, at least five centimeters away from the anus.
Initially, I thought it was a sebaceous cyst and left it alone, believing it would resolve on its own since I couldn't feel it.
Later, after researching, I suspected it might be an anal abscess.
I didn't see a doctor, but for the first two years, I had a large lump more than five centimeters from the anus.
After healing, I couldn't feel the lump anymore, and there was no pus or opening on the surface, but there was a small circular area of pigmentation that looked like a scar.
When I pressed it with my finger, it felt indented, and occasionally, if the surface was pulled, it would hurt like a bruise.
There has been no recurrence, but last year, another lump appeared slightly farther from the anus.
The healing wound was similar to the previous situation, and a few months ago, I had another abscess in a different location.
I noticed that every time the abscess occurred, it was on the left side of my buttocks.

I would like to ask the doctor:
1.
Since each abscess is in a different location on the left side, is this indicative of an anal abscess, or could it possibly be a sebaceous cyst? (There is a subcutaneous lump that sometimes becomes very large and painful, but eventually resolves, leaving only the two aforementioned scar-like pigmented wounds.)
2.
Why does it keep appearing in different locations? How can I prevent this?
3.
Is the indentation when pressing on the wound indicative of an anal fistula? (It has been several years since it appeared, and it has healed without an opening or pus, and there has been no recurrence at the same location.) Under what circumstances should I see a doctor?
4.
If my buttocks swell again, should I see a doctor immediately, or can I wait to see if it heals on its own? Will the outpatient doctor drain it directly? If the drainage wound does not heal, does that mean it has turned into an anal fistula?

Ms. Chen, 20~29 year old female. Ask Date: 2023/08/27

Dr. Zhang Shuhao reply Surgery


1.
In addition to considering sebaceous cysts or anal abscesses, it is important to evaluate for the presence of a subcutaneous fistula, which can only be diagnosed through a physician's examination.

2.
Avoid diarrhea and smoking, and enhance skin hygiene; if there is swelling and pain, medical evaluation is still necessary.

3.
A feeling of depression at the wound site may indicate a subcutaneous fistula or a cavity formed after inflammation, and it must be connected to the anal glands to be classified as an anal fistula.

4.
If there are recurrent episodes, it is advisable to seek medical evaluation to identify the underlying cause for appropriate treatment and prevention.

Reply Date: 2023/08/27

More Info


Understanding anal abscesses is crucial for anyone experiencing symptoms related to this condition. An anal abscess is a painful condition that occurs when a collection of pus forms near the anus, often due to an infection. The symptoms can vary, but they typically include swelling, pain, and sometimes fever. In your case, it seems you have experienced recurrent swelling in the area, which raises several important questions.

1. Is it an anal abscess or a sebaceous cyst? Given your description of the swelling occurring in different locations and the pain associated with it, it is possible that you are dealing with anal abscesses rather than sebaceous cysts. Sebaceous cysts are generally painless and do not typically cause significant swelling or discomfort unless they become infected. On the other hand, anal abscesses are often associated with pain, tenderness, and sometimes fever. The fact that you have experienced these swellings multiple times, especially in the left side of your buttocks, suggests that they may be related to anal glands or other structures in that area.

2. Why do they keep appearing in different locations? The recurrence of abscesses in different locations could be due to several factors, including the anatomy of the anal region, the presence of multiple glands that can become blocked, or underlying conditions that predispose you to infections. It is also possible that there is a chronic infection or a fistula (an abnormal connection between the anal canal and the skin) that is causing these recurrent issues.
3. What does the indentation at the scar site indicate? The indentation you feel when pressing on the scar could suggest that there is some underlying tissue change, possibly related to the healing process of the abscess. If it feels like a pit or a dimple, it may indicate that the tissue has not fully healed or that there is a connection to the anal canal, which could be a sign of a fistula.
4. When should you see a doctor? It is advisable to seek medical attention if you experience any of the following: persistent pain, fever, drainage of pus, or if the swelling does not resolve on its own within a few days. If you notice any changes in the characteristics of the swelling, such as increased size or tenderness, you should also consult a healthcare provider.
5. Should you wait for it to heal on its own? While some minor swellings may resolve without intervention, given your history of recurrent abscesses, it would be prudent to consult a doctor sooner rather than later, especially if you experience significant discomfort. A healthcare provider can assess the situation and determine whether drainage or further intervention is necessary.
6. Will the doctor drain it directly? If an abscess is diagnosed, the doctor will likely recommend drainage. This procedure is typically done in a clinical setting and involves making an incision to allow the pus to escape. If the abscess is not drained properly, it could lead to the formation of a fistula, which is a more complex condition requiring additional treatment.

In conclusion, while some anal swellings may resolve on their own, your recurrent symptoms and the nature of the swelling suggest that it would be wise to seek medical evaluation. A healthcare provider can perform a thorough examination, possibly including imaging studies, to determine the exact nature of the problem and recommend appropriate treatment. Early intervention can prevent complications and improve your overall health and comfort.

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