Diarrhea (Chronic)

Chronic loose stools are a signal, not a personality. We look at bile acids, infections, food reactions, microbiome balance, inflammation, toxic burden, thyroid, and the nervous system.

What you may be noticing

Loose or watery stools most days, often urgent. You plan routes around bathrooms. Mornings or meals trigger a rush. You may feel drained, depleted, or bloated, and food has started to feel like a risk.

Blood in the stool, black stools, fever, nighttime diarrhea that wakes you, unexplained weight loss, or severe dehydration need prompt medical evaluation.

Why it is rarely one thing

Diarrhea happens when the gut releases too much fluid, absorbs too little, or moves contents too quickly. Chronic diarrhea lasting more than four weeks deserves a careful search, because the causes are many and each calls for a different approach.

Common drivers include irritable bowel syndrome with diarrhea, bile acid malabsorption, celiac disease, inflammatory bowel disease, microscopic colitis, lactose and fructose intolerance, SIBO, parasites and other infections, an overactive thyroid, and medication side effects. Gallbladder removal can leave bile flowing continuously into the gut. Stress speeds transit through the gut-brain axis. Bile acid malabsorption may explain a meaningful share of cases labeled IBS, yet it is rarely tested, and microscopic colitis looks normal on colonoscopy unless biopsies are taken.

I also look through the lens of the toxic burden bucket. Parasites, fungal overgrowth, mold exposure, and environmental chemicals accumulate, and the gut is often where an overflowing bucket shows itself first. Not a weak gut, but a gut responding to specific signals. The goal is to find those signals rather than suppress the symptom alone.

Patterns we look for

• Bile acid malabsorption, especially after gallbladder removal.
• Celiac disease and gluten reactivity.
• Stool inflammatory markers such as calprotectin.
• Parasites, bacterial pathogens, and post-infectious IBS.
• SIBO and microbiome imbalance.
• Stomach acid and pancreatic enzyme output.
• Lactose, fructose, and FODMAP intolerance.
• Thyroid function and histamine patterns.
• Mold and environmental toxin exposure.
• Autonomic balance and sympathetic overdrive.
• Nutrient losses: zinc, magnesium, potassium, B12, and iron.

How I evaluate it

The comprehensive functional neurological exam includes autonomic testing and vagal tone, which shape motility through the gut-brain axis.

Functional labs may include a comprehensive stool analysis with pathogens, calprotectin, elastase, and microbiome markers; celiac antibodies; intestinal permeability markers; a thyroid panel; a complete blood count, ferritin, and B12; electrolytes; SIBO breath testing; and mycotoxin or bile acid testing when indicated. I coordinate with your gastroenterologist for colonoscopy when inflammation, bleeding, or age-based screening applies.

How we address it

My 8R gut model sets the order, because sequence determines tolerance.

1. Rule out inflammatory, infectious, and serious causes with your physician.
2. Calm the gut-brain axis with vagal tone training and nervous system regulation.
3. Replete fluids, electrolytes, and depleted nutrients.
4. Remove specific triggers through a temporary, individual elimination with planned reintroduction.
5. Replace what is missing: bile acid support, enzymes, and stomach acid support as indicated.
6. Treat infections and SIBO where found, then reinoculate and repair the barrier.
7. Lower toxic burden only once the gut is steadier.

Freedom from the bathroom map is a reasonable goal. The gut can find its rhythm again.

Book your Comprehensive Functional Medicine Eval/Neurological Exam today to discover what the contributing root causes are that are underlying your health concerns.