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Diarrhea

Diarrhea, characterized by frequent loose stools, can stem from infections, diet, stress, or medical conditions. In Houston, Dr. Rishi Chadha at GastroDoxs offers expert diagnosis and personalized treatments from lifestyle adjustments to advanced procedures to relieve symptoms and rapidly restore gut health.

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Rishi Chadha

About the Expert

Dr. Rishi Chadha, MD is a board‑certified gastroenterologist who specializes in preventive gastroenterology, colorectal cancer screening, and minimally invasive endoscopic procedures. He completed his fellowship at Sunrise Health GME in Las Vegas and previously trained in internal medicine at St. Vincent’s Medical Center in Connecticut.

What Is Diarrhea?

  • Loose, watery stools occurring more often than normal
  • Can last from a few hours up to several days
  • It's a symptom not a disease often coded as ICD-10 R19.7

Common Symptoms

  • Three or more loose stools per day
  • Abdominal cramps or belly pain
  • Urgent need to use the bathroom
  • Gas or bloating
  • Dehydration signs: dry mouth, dark urine, dizziness

Common Causes and Risk Factors

  • Infections: viruses, bacteria, or parasites
  • Food reactions: spicy foods, dairy, artificial sweeteners
  • Medications: antibiotics disrupting gut bacteria
  • Stress and anxiety affecting digestion
  • Hormonal changes during pregnancy
  • Chronic GI disorders: IBS, IBD, celiac disease

How Dr. Rishi Diagnoses Diarrhea?

Dr. Rishi Chadha uses a step-by-step approach:

Medical History and Physical Exam

He reviews your symptom timeline, diet changes, recent travel, stress levels, medications, and past health issues.

Stool and Blood Tests

We analyze stool samples for pathogens or blood and run blood panels to check for inflammation, infection markers, and malabsorption.

Breath Tests

Lactose and SIBO breath tests detect carbohydrate malabsorption or bacterial overgrowth in the small intestine.

Endoscopic Evaluation

  • Colonoscopy examines the colon lining directly, rules out IBD or colitis, and allows for biopsy sampling.
  • Capsule endoscopy visualizes the small intestine to identify sources of chronic diarrhea beyond the reach of standard scopes.

Imaging Studies

Abdominal ultrasound, CT, or MRI may be ordered to assess structural issues, masses, or organ inflammation.

Rishi Chadha
Treatment

Our Houston team offers a full range of care for diarrhea relief.

1. Lifestyle and Diet Changes

  • Increase fluid intake with water and electrolyte solutions
  • Follow the BRAT diet: bananas, rice, applesauce, and toast
  • Identify and avoid individual trigger foods
  • Use probiotics to help restore healthy gut bacteria

2. Medications

  • Short-term use of loperamide or bismuth subsalicylate for symptomatic relief
  • Bile acid binders when bile acid malabsorption is suspected
  • Targeted antibiotics only if a bacterial infection is confirmed

3. Advanced Tests and Procedures

  • Colonoscopy to evaluate colitis, obtain biopsies, or rule out structural issues
  • Capsule endoscopy for a detailed look at the small intestine
  • Endoscopic mucosal resection to remove and analyze abnormal tissue if needed
Rishi Chadha

About the Author

Dr. Rishi Chadha, MD is a board‑certified gastroenterologist who specializes in preventive gastroenterology, colorectal cancer screening, and minimally invasive endoscopic procedures. He completed his fellowship at Sunrise Health GME in Las Vegas and previously trained in internal medicine at St. Vincent’s Medical Center in Connecticut.

Frequently Asked Questions

What causes sudden diarrhea?

Most often it's triggered by something you ate, a stomach infection (viral, bacterial, or parasitic), or high stress levels.

Is diarrhea always linked to pregnancy?

No. While hormonal changes in early pregnancy can cause diarrhea, many other factors'like diet or infections can also be responsible.

Can stress cause diarrhea?

Yes. Stress and anxiety can alter gut motility and fluid balance, leading to loose, urgent stools.

When is diarrhea an emergency?

Seek immediate care if you have blood in your stool, a fever above 102 deg F (38.9 deg C), severe dehydration (dry mouth, dizzy spells), or uncontrollable pain.

Does frequent diarrhea mean cancer?

Not necessarily. Chronic diarrhea can stem from IBS, IBD, celiac disease, or other non-cancerous conditions. Persistent symptoms should always be evaluated.

When should I see a doctor?

If diarrhea lasts more than two days, or sooner if you feel weak, dizzy, severely dehydrated, or have alarming symptoms like bloody stools.

Can antibiotics cause diarrhea?

Yes. Antibiotics can disrupt the balance of good bacteria in your gut, often leading to antibiotic-associated diarrhea.

What foods help stop diarrhea?

Follow the BRAT diet - bananas, rice, applesauce, and toast - and sip plenty of water or oral rehydration fluids to replace lost electrolytes.

Should I take probiotics?

In many cases, yes. Probiotics can help restore healthy gut flora. Ask Dr. Chadha which strain and dose are best for you.

What is the ICD-10 code for diarrhea?

The primary code is R19.7 for unspecified diarrhea. Functional diarrhea may be coded K59.1.

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