Blood in Stool and Unexplained Hives: When to Seek Medical Attention? - Gastroenterology and Hepatology

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Blood in the stool during a bowel movement, followed by unexplained hives a week later?


Hello, last Saturday after going out, I noticed bright red blood at the end of my stool that seemed to be attached to the outside.
The stool was yellow, and the amount of blood was small.
I don't think it's an anal fissure because there was no pain and the stool was soft.
The next day, I started my menstrual period, so it was hard to tell if there was still blood in my stool.
However, I experienced some diarrhea (which sometimes happens during my period).
By the fifth or sixth day of my period, when the bleeding had mostly stopped, I observed that there was no blood in my stool, but I still had diarrhea after meals.
I'm not sure if this is due to being overly concerned about my abdominal condition.
Additionally, I suddenly developed hives for an unknown reason, and I'm unsure if there's a connection.
Should I get a colonoscopy or a fecal occult blood test right away, or should I wait and observe for a while?

Chen, 20~29 year old female. Ask Date: 2015/08/01

Dr. Cai Anshun reply Gastroenterology and Hepatology


Hello: It is difficult to say whether gastrointestinal symptoms are related to urticaria.
However, if the symptoms persist after the menstrual cycle, you may consider consulting a gastroenterologist or a colorectal specialist for further evaluation as determined by the physician.
Changhua Hospital cares about your health.
Dr.
Tsai An-Shun.

Reply Date: 2015/08/01

More Info


When it comes to the presence of blood in stool and the occurrence of unexplained hives, it is essential to approach the situation with caution and awareness of potential underlying health issues. Blood in the stool, even in small amounts, can be a sign of various gastrointestinal conditions, some of which may require medical attention. The fact that you observed bright red blood attached to your stool suggests that it may originate from the lower gastrointestinal tract, such as the rectum or anus. Common causes of such bleeding can include hemorrhoids, anal fissures, or diverticular disease. However, it is crucial to note that other more serious conditions, such as colorectal polyps or even colorectal cancer, can also present with similar symptoms.

Given that you mentioned the blood was not accompanied by pain during bowel movements and that your stools were soft, it may initially suggest a less severe issue, such as hemorrhoids. However, the presence of blood should not be dismissed, especially if it recurs. The fact that you experienced diarrhea during your menstrual period could be related to hormonal changes, which can affect gastrointestinal motility, but it is also important to consider that stress or anxiety about your symptoms could exacerbate gastrointestinal issues.

The appearance of hives (urticaria) is another symptom that warrants attention. Hives can be triggered by various factors, including allergic reactions, stress, infections, or even certain medications. While hives themselves may not be directly related to gastrointestinal bleeding, they could indicate an underlying allergic reaction or other systemic issues that may need to be evaluated.

In terms of whether you should seek immediate medical attention or wait and observe, it is generally advisable to err on the side of caution when it comes to gastrointestinal bleeding. If the blood in your stool persists, increases in quantity, or is accompanied by other concerning symptoms such as significant abdominal pain, changes in bowel habits, weight loss, or signs of anemia (such as fatigue or paleness), you should seek medical evaluation promptly. A healthcare provider may recommend a stool occult blood test or a colonoscopy to investigate the source of the bleeding further.

In summary, while the initial observation of blood in your stool and the occurrence of hives may not seem directly related, both symptoms warrant careful monitoring. If you experience any worsening of symptoms or new concerning signs, do not hesitate to consult a healthcare professional. Early intervention can be crucial in identifying and managing any potential health issues effectively.

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