I have IBSD. Should I worry about colon cancer?

Question

Hello doctor,

I am 24 and have had IBS-D symptoms since college, mostly loose stools before exams or travel. Recently, the frequency increased with mucus in stool, though no blood. My ESR and CRP are normal.

The doctor gave Xifaxan for 14 days, which helped for a few weeks. I am looking for your opinions on:

Is it normal for symptoms to come back after antibiotics?
Can Rifaximin be repeated safely?
Also, should I be worried about colon cancer or IBD at this age, despite normal tests?

The unpredictability is affecting daily routine and food choices badly.

Kindly suggest.

Answer 1

Hello,

Welcome to icliniq.com.

I understand your concern.

Your symptoms are typical of irritable bowel syndrome with diarrhea predominance (IBS-D). Stress-related loose stools before exams or travel are very common in IBS because of the gut-brain axis, where emotional stress increases bowel sensitivity and motility.

The presence of small amounts of mucus can occur in IBS and, by itself, is not alarming. The reassuring factors in your case are normal ESR (erythrocyte sedimentation rate) and CRP (C-reactive protein), absence of blood in stool, and improvement after treatment.

These make conditions like inflammatory bowel disease or colon cancer very unlikely at your age.

Regarding treatment, Rifaximin is commonly used for IBS-D. It works by modifying gut bacteria and reducing intestinal gas and inflammation. It is not unusual for symptoms to return after a few weeks, and in selected patients, the course can be safely repeated under medical supervision if symptoms recur.

Because IBS is a chronic functional disorder, symptoms often fluctuate rather than disappear permanently. Management usually includes multiple strategies, such as:

Identifying dietary triggers (often using a low-FODMAP (fermentable oligosaccharides, disaccharides, monosaccharides, and polyols) diet trial).
Stress reduction or cognitive behavioral therapy.
Probiotics in some patients.

Antispasmodics or antidiarrheal medication, when needed. If you develop alarm features such as persistent weight loss, anemia, blood in stool, nighttime diarrhea, or a strong family history of colon cancer, further evaluation would be necessary.

Otherwise, with appropriate lifestyle adjustments and tailored therapy, many IBS-D patients achieve good symptom control and improved quality of life.

I hope you find this helpful.

For more queries, feel free to reach out to me anytime.

Thank you.