What Does Poop Look Like with Diverticulitis?

Diverticulitis is an inflammation or infection of small pouches (diverticula) that can form along the wall of the colon. Changes in bowel movements—especially the appearance of your poop—are a common feature. Understanding what to look for can help you recognize symptoms early and seek appropriate care.

Common Stool Characteristics in Diverticulitis

People with diverticulitis may notice one or more of the following changes in their poop:

• Hard, lumpy stools

  • Often associated with constipation
  • May appear as separate, small pellets (Bristol Type 1–2)
  • Caused by slowed transit time and dehydration of stool

• Loose or watery stools (diarrhea)

  • Frequent, urgent bowel movements (Bristol Type 6–7)
  • May occur when inflammation irritates the colon lining
  • Sometimes accompanied by cramping or urgency

• Mucus in the stool

  • Shiny, jelly-like coating on the poop
  • Sign of irritation or mild inflammation in the colon

• Blood or bright red streaks

  • Fresh blood on the surface of the stool or toilet paper
  • Can range from a few drops to heavier bleeding
  • Indicates that inflamed diverticula may have bled

• Pencil-thin or ribbon-like stool

  • Uncommon, but possible if swelling or scar tissue narrows the colon
  • Stool flattens as it passes through a tighter segment

Why Stool Changes Occur

Stollman and Raskin (2004) describe how inflammation in diverticulitis alters normal bowel function:

• Inflammation & Swelling
  Diverticula that become inflamed may narrow the colon lumen, changing the shape and consistency of stool.

• Altered Motility
  The irritated colon can either slow down (leading to constipation) or speed up (leading to diarrhea).

• Mucosal Damage
  Inflamed tissue may secrete excess mucus and bleed slightly, mixing with the stool.

Other Signs and Symptoms to Watch For

While stool appearance is a key clue, diverticulitis usually presents with a constellation of symptoms. If you notice any of the following along with stool changes, contact your healthcare provider promptly:

• Sharp or cramping pain in the lower left abdomen
• Fever and chills
• Nausea or vomiting
• A feeling of fullness or bloating
• Loss of appetite

When to Seek Medical Help

Diverticulitis can range from mild to severe. Some mild cases improve with rest, a liquid diet, and antibiotics prescribed by your doctor. However, you should seek immediate medical attention—or call emergency services—if you experience:

• Severe, unrelenting abdominal pain
• High fever (over 102°F or 39°C)
• Persistent vomiting or inability to keep liquids down
• Signs of dehydration (dizziness, dry mouth, little or no urine)
• Significant rectal bleeding or black, tarry stool

For a quick, free, online evaluation, you might consider doing a free, online symptom check for diverticulitis.

Managing Bowel Habits

Once diverticulitis is under control, it’s important to promote regular, healthy bowel movements:

• Increase fiber intake gradually

  • Fruits, vegetables, whole grains
  • Helps form softer, bulkier stool that passes easily

• Stay hydrated

  • Aim for 8–10 cups of fluids daily
  • Prevents hard, dry stools

• Exercise regularly

  • Stimulates healthy colon motility
  • A 20–30 minute walk most days can help

• Follow your doctor’s dietary recommendations

  • In some cases, a temporary low-fiber or clear-liquid diet may be advised during a flare-up

When Poop Changes Persist

If changes in your poop last more than a few days or recur frequently, discuss this with your healthcare provider. Persistent diarrhea can lead to dehydration and electrolyte imbalances. Chronic constipation can worsen diverticula and increase pressure in the colon.

Key Takeaways

• Poop in diverticulitis can vary: from hard, lumpy stools to loose, watery diarrhea.
• Mucus, blood, or pencil-thin stool may signal inflammation or narrowing of the colon.
• Always pay attention to other symptoms—pain, fever, nausea—and seek prompt care for severe signs.
• You can do a free, online symptom check for diverticulitis to get an initial assessment.
• Speak to a doctor about any potentially serious or life-threatening symptoms.

If you’re ever in doubt about changes in your poop or experience alarming symptoms—especially intense pain, high fever, or heavy bleeding—speak to a doctor right away. Early treatment can prevent complications and help you get back to feeling your best.