Flatulence

Intestinal Gas / Excess Gas

Mild severity76% reported by patientsICD-10: R14.3

Summary

Excess intestinal gas causing bloating, abdominal discomfort, and frequent passing of gas.

What is it?

Flatulence is the passage of gas from the digestive system through the rectum, averaging 10–20 times per day in healthy adults. Gas is produced by swallowed air and bacterial fermentation of undigested carbohydrates in the colon. While usually benign and diet-related, excessive flatulence with abdominal pain, diarrhea, or weight loss may indicate lactose intolerance, celiac disease, SIBO (small intestinal bacterial overgrowth), or IBS.

Common causes

Dietary

  • Beans and legumes
  • Cruciferous vegetables (cabbage, broccoli, Brussels sprouts)
  • Onions and garlic
  • Carbonated beverages
  • Sugar alcohols (sorbitol, xylitol in sugar-free products)

Food Intolerances

  • Lactose intolerance
  • Fructose malabsorption
  • Gluten sensitivity / celiac disease

Gastrointestinal Conditions

  • IBS
  • SIBO
  • IBD
  • Gastroparesis
  • Constipation

Medications

  • Acarbose
  • Metformin
  • Lactulose
  • Antibiotics (disrupting gut flora)
  • Fiber supplements (initial use)

When to see a doctor

  • 1Flatulence with unexplained weight loss, diarrhea, or bloody stools
  • 2Severe abdominal pain or distension accompanied by gas and inability to pass stool (obstruction)
  • 3Gas with chronic diarrhea and steatorrhea (fatty, foul-smelling stools) — malabsorption
  • 4Symptoms triggered consistently by wheat products — celiac disease evaluation
  • 5New onset severe flatulence after antibiotic use — consider C. difficile infection

What you can do

  • ✓Eat slowly and chew thoroughly — reduces swallowed air
  • ✓Avoid carbonated drinks and chewing gum
  • ✓Identify and eliminate trigger foods through an elimination diet or food diary
  • ✓Try a low-FODMAP diet trial for 2–4 weeks if IBS is suspected
  • ✓Probiotics may improve gut flora balance and reduce gas production for some people

Conditions that cause this symptom

IBSK58.9Celiac DiseaseK90.0Crohn's DiseaseK50.90

Medications that may help

Treatment depends on the underlying cause. Always consult your provider before starting any medication.

Simethicone

Anti-gas agent — breaks up gas bubbles in GI tract

Lactase enzyme

Enzyme replacement for lactose intolerance

Rifaximin

Non-absorbable antibiotic for SIBO and IBS-D

Frequently asked questions

This page is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult your doctor or a qualified health provider with questions about your symptoms or medical conditions.

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