Black Growths Near the Anus: When to See a Specialist

Black tumor at the anal opening?

I noticed pain around my anus while showering yesterday, and it seems like there is something growing there.
I later discovered a round, smooth-surfaced, approximately 0.5 cm black lesion.
Should I see a colorectal surgeon or a dermatologist for this condition?

Māomī, 40~49 year old female. Ask Date: 2015/09/26

Dr. Ke Fangxu reply Surgery

Based on your description, it seems likely that you have a small thrombosed external hemorrhoid.
It is generally recommended to apply topical ointments and take warm sitz baths.
It should heal in about one to two weeks.
If it has not reduced in size after two weeks, you should consult a colorectal specialist for evaluation.

Reply Date: 2015/09/26

More Info

When you discover a new growth near the anus, especially one that is painful and has a distinct appearance, it is essential to approach the situation with caution. The growth you described—a smooth, round, black lesion approximately 0.5 cm in size—could represent several different conditions, and understanding the nature of this growth is crucial for determining the appropriate course of action.

First and foremost, it is advisable to consult a healthcare professional. Given the location and characteristics of the growth, a visit to a colorectal surgeon (also known as a proctologist) would be the most appropriate initial step. Colorectal surgeons specialize in conditions affecting the colon, rectum, and anus, and they are well-equipped to evaluate and diagnose any abnormalities in that area. They can perform a thorough examination and may recommend further diagnostic tests, such as a biopsy, to determine the nature of the growth.

There are several potential causes for a black growth near the anus. Some possibilities include:
1. Skin Tags: These are benign growths that can appear in various areas of the body, including around the anus. They are usually painless and may be skin-colored or slightly darker.

2. Hemorrhoids: Swollen blood vessels in the rectal area can sometimes appear as lumps. If they become thrombosed (clotted), they may appear darker and can be quite painful.

3. Pigmented Lesions: These can include benign moles or nevi, but they can also represent more serious conditions, such as melanoma, especially if they change in size, shape, or color.

4. Anal Warts: Caused by the human papillomavirus (HPV), these growths can appear around the anus and may be smooth or rough in texture.

5. Fungal or Bacterial Infections: In some cases, infections can lead to the formation of growths or lesions that may appear dark.

6. Malignant Growths: While less common, it is crucial to rule out the possibility of cancerous lesions, particularly if there are changes in the growth over time or if there are accompanying symptoms such as bleeding, significant pain, or changes in bowel habits.

In terms of when to seek help, you should not wait for the growth to change or worsen. If you experience any of the following symptoms, it is imperative to seek medical attention promptly:
- Increased pain or discomfort
- Bleeding from the growth or rectum
- Changes in bowel habits (such as diarrhea or constipation)
- Unexplained weight loss
- Changes in the appearance of the growth (such as rapid growth, color change, or irregular borders)
In conclusion, while it may be tempting to dismiss a new growth as a minor issue, it is always best to err on the side of caution. Consulting a colorectal surgeon will provide you with the expertise needed to assess the growth accurately and determine the appropriate treatment if necessary. Early diagnosis and intervention are key to managing any potential issues effectively.

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