Why does IBS-D cause repeated morning bowel movements?

Question

Hello doctor,

I am a 28-year-old female and weigh approximately 128 pounds. I was diagnosed with IBS-D about eight months ago. My main issue is that every morning, I spend one to two hours in the bathroom repeatedly. I passed stool once, but the urge returned a few minutes later. This makes my mornings very stressful.

Currently, I take Mebeverine 135 milligrams twice daily and sometimes use ORS if the diarrhea becomes severe. A colonoscopy was performed earlier, and my doctor said the results were normal. However, my daily routine is becoming very difficult.

Why do I spend two hours in the bathroom every day with IBS-D?
Is there any treatment or dietary approach that can help reduce this frequency?

Kindly advise.

Answer 1

Hello,

Welcome to icliniq.com.

I read your query and understand your concern.

In irritable bowel syndrome with diarrhea (IBS-D), the intestines become overly sensitive and overactive, especially in the morning. After waking up and eating, the gastrocolic reflex (a normal reflex that stimulates bowel movement after meals) becomes stronger, leading to a repeated urge to pass stool.

This is why stool may be passed once, but the urge returns within minutes. This does not mean that a new stool has fully formed; rather, it occurs because of increased bowel activity and heightened rectal sensitivity.

Stress and anxiety can also play a significant role. The brain-gut connection is often more active in the morning, which can make symptoms feel worse during that time.

A normal colonoscopy is reassuring. IBS is a functional gastrointestinal disorder, not a structural disease, so diagnostic tests are usually normal.

Mebeverine can help reduce intestinal spasms, but it may not be sufficient on its own in all cases. Additional treatment may be required depending on symptom severity.

Diet plays an important role in symptom control. A low-fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAP) diet may help. This involves reducing foods such as milk, onions, garlic, wheat, certain fruits, and artificial sweeteners, as these can increase gas production and bowel activity.

It is also advisable to avoid early morning triggers such as strong tea or coffee on an empty stomach, as they can stimulate bowel movements. Adding soluble fiber, such as psyllium husk, in small amounts may help regulate stool consistency and reduce bowel frequency.

Some patients benefit from Loperamide hydrochloride, which can reduce stool frequency, or from gut-directed probiotics. Relaxation techniques, yoga, and stress-management strategies may also be beneficial because IBS is strongly associated with stress.

Overall, these symptoms are typical of IBS-D, and with appropriate dietary modifications and a combination of treatment approaches, morning bowel frequency can often be reduced significantly.

I hope this is clear, and if you have any questions at any time, please feel free to ask.

Thank you.