the Black Line Between Anus and Scrotum: Causes and Concerns - Surgery

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The black line between the anus and the scrotum?


Hello Doctor, recently I have been experiencing harder stools, and sometimes when I wipe after a bowel movement, there is a little bit of blood.
When I touch the area around the anus, I can feel a black line between the anus and the scrotum.
The part closer to the anus is wider, and it feels like there is a growth resembling a piece of flesh that becomes thicker as it approaches the anus.
The starting point of this line near the anus has a slight protrusion and is painful, which I suspect is caused by the friction from passing hard stools.
Could this be a hemorrhoid? It doesn't quite resemble the small fleshy balls that others describe as hemorrhoids, and its location is along the black line near the anus.
I would appreciate your guidance on this matter.
Thank you!

Xiao Wu, 40~49 year old female. Ask Date: 2021/05/19

Dr. Ke Fangxu reply Surgery


It is not possible to determine the issue based solely on a written description.
I recommend that you see a specialist for a personal examination to obtain an accurate diagnosis.
It could potentially be hemorrhoids, but it may also be an anal abscess.
Please seek medical attention promptly to avoid delaying your condition.

Reply Date: 2021/05/19

More Info


The presence of a black line between the anus and scrotum, along with the symptoms you described, raises several important considerations regarding your health. The symptoms of hard stools, slight bleeding when wiping, and the sensation of a thickened area near the anus could indicate a few different conditions, and it is essential to approach this with care.

Firstly, the black line you are noticing could be a normal anatomical feature known as the anal verge, which is the transition zone between the skin and the mucous membrane of the anal canal. However, if there is a noticeable change in color, texture, or if it is associated with discomfort, it may warrant further investigation.

The bleeding you mentioned, especially if it occurs after bowel movements, could be a sign of hemorrhoids or anal fissures. Hemorrhoids are swollen veins in the lower rectum or anus that can cause discomfort, itching, and bleeding, particularly during bowel movements. Anal fissures, on the other hand, are small tears in the lining of the anus that can occur due to passing hard stools, leading to pain and bleeding.

The thickened area you described, which feels like a raised line or mass, could potentially be a thrombosed hemorrhoid or a skin tag, which can develop as a result of chronic straining during bowel movements or irritation. It is not uncommon for individuals with hard stools to develop these conditions, as the strain can lead to increased pressure in the anal region.

It is important to note that while the symptoms you describe may not necessarily indicate a serious condition, it is crucial to consult a healthcare professional for a proper diagnosis. They may perform a physical examination and possibly recommend further tests, such as a colonoscopy, if there are concerns about other underlying issues.

In terms of treatment, if hemorrhoids or fissures are confirmed, management may include dietary changes to increase fiber intake, ensuring adequate hydration, and possibly using over-the-counter topical treatments to alleviate discomfort. In some cases, more invasive treatments may be necessary if conservative measures do not provide relief.

Regarding your concern about whether this could be a "痣瘡" (which translates to "mole" or "wart"), it is less likely based on your description. Warts typically have a different appearance and texture compared to what you are describing. However, any new growth or change in the skin should be evaluated by a healthcare provider to rule out any potential skin conditions or malignancies.

In summary, while the symptoms you are experiencing may be related to common conditions such as hemorrhoids or anal fissures, it is essential to seek medical advice for an accurate diagnosis and appropriate treatment. Early intervention can help prevent complications and improve your overall comfort and health.

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