Rectal Bleeding: Causes and Concerns for Young Adults - Surgery

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Rectal bleeding


Hello Doctor, for the past month, I have been experiencing hard stools and pain during bowel movements.
Sometimes I notice bright red blood in the toilet or on toilet paper.
I am concerned about what this might indicate, especially since I am 20 years old and worried it could be colon cancer.
Additionally, I have noticed a small lump near the anal area that has been present for quite a while, but I am not sure when it appeared since it hasn't caused any pain, so I haven't paid much attention to it.
Could the bleeding be related to this lump?

Nìmíng, 20~29 year old female. Ask Date: 2023/12/21

Dr. Zhang Shuhao reply Surgery


There are three common causes of rectal bleeding: 1.
Anal fissures or skin irritation leading to minor bleeding, characterized by a small amount of blood accompanied by a sharp pain at the site of the injury.
2.
Ruptured thrombosed hemorrhoids, which typically produce slightly more blood than the first cause, usually occurring after straining during bowel movements, and may be painless or cause only mild discomfort.
3.
Gastrointestinal bleeding related to conditions such as polyps, ulcers, or tumors, which tends to be darker in color and may be associated with changes in bowel habits or abdominal symptoms, though it is less common in younger individuals.
Based on your age and symptoms, causes 1 or 2 are more likely.
If you are genuinely concerned about gastrointestinal issues, you may discuss with a gastroenterologist or a colorectal surgeon the possibility of scheduling a colonoscopy.
As for the small growth near the anus, it could be an external hemorrhoid or a skin tag, which may not necessarily be related to the bleeding.

Reply Date: 2023/12/21

More Info


Rectal bleeding can be a concerning symptom, especially for young adults. Given your description of hard stools, painful bowel movements, and the presence of bright red blood in the toilet or on toilet paper, there are several potential causes to consider.
Firstly, the most common cause of rectal bleeding in young adults is hemorrhoids. Hemorrhoids are swollen veins in the rectal area that can become inflamed and bleed, especially during bowel movements. The fact that you mentioned a "small meatball" near your anus could indicate an external hemorrhoid or possibly a thrombosed hemorrhoid, which can be quite painful and may cause bleeding.
Another possibility is anal fissures, which are small tears in the lining of the anus that can occur due to passing hard stools. These can cause sharp pain during and after bowel movements, and they often lead to bright red blood on the stool or toilet paper.
While less common, other conditions such as diverticular disease, inflammatory bowel disease (like Crohn's disease or ulcerative colitis), or even polyps can cause rectal bleeding. However, these conditions are typically accompanied by other symptoms such as abdominal pain, changes in bowel habits, or weight loss.

Your concern about colorectal cancer is understandable, especially given the presence of rectal bleeding. However, it is important to note that colorectal cancer is relatively rare in individuals your age. That said, any persistent changes in bowel habits, unexplained weight loss, or significant changes in stool appearance should be evaluated by a healthcare professional.

Given your symptoms, it is crucial to seek medical attention. A healthcare provider will likely perform a physical examination, which may include a digital rectal exam, and possibly recommend further tests such as a colonoscopy to visualize the colon and rectum. This is particularly important if the bleeding persists or worsens.

In the meantime, to alleviate some of your symptoms, consider increasing your dietary fiber intake to help soften your stools. Foods rich in fiber include fruits, vegetables, whole grains, and legumes. Staying well-hydrated is also essential. Over-the-counter stool softeners or fiber supplements may be beneficial as well.
If you are experiencing significant pain or discomfort, or if the bleeding does not resolve, do not hesitate to seek immediate medical care. It is always better to err on the side of caution when it comes to symptoms like rectal bleeding.
In summary, while hemorrhoids and anal fissures are the most likely culprits for your symptoms, it is essential to have a thorough evaluation by a healthcare professional to rule out more serious conditions and to receive appropriate treatment.

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