Diverticular Disease : 5 Common Symptoms and When to See a Doctor

Diverticular Disease : 5 Common Symptoms and When to See a Doctor

Diverticular disease is a common digestive condition affecting the large intestine (colon). It occurs when small, bulging pouches called diverticula develop in the lining of the bowel. While many people live with these pouches without issue (diverticulosis), they can cause symptoms or become inflamed/infected (diverticulitis).

Understanding the difference between mild irritation and a medical emergency is key to managing your gut health.

1. Lower Left Abdominal Pain

In the UK and Western countries, diverticular pain most commonly strikes the lower left side of the abdomen.

• What it feels like: A persistent dull ache or sharp cramps that may worsen after eating. You might find that passing wind or having a bowel movement provides temporary relief.

• Worry less if: The pain is mild, intermittent, and not accompanied by a fever.

• See a doctor if: The pain becomes constant, severe, or shifts from a dull ache to a sharp, stabbing sensation.

Note: Persistent tenderness in the lower left abdomen is the hallmark sign of acute diverticulitis.

2. Changes in Bowel Habits

Diverticular disease often disrupts the natural rhythm of your digestion.

• What it feels like: You may experience bouts of constipation, diarrhoea, or a frustrating “see-saw” between the two.

• Worry less if: Changes are mild and resolve with increased dietary fibre (like whole grains and vegetables) and hydration.

• See a doctor if: You notice a persistent change in bowel habits lasting more than two weeks, or if you are over 50 and experiencing these symptoms for the first time.

3. Persistent Bloating and Gas

While bloating is a common digestive complaint, in diverticular disease, it is often more pronounced.

• What it feels like: A painful feeling of “fullness,” visible swelling (distension), and excessive flatulence.

• Worry less if: It happens occasionally after heavy meals or specific trigger foods.

• See a doctor if: The bloating is accompanied by abdominal tenderness, a “hard” feeling in the stomach, or if you can no longer pass wind.

4. Fever, Nausea, and Chills

These are systemic symptoms that suggest the body is fighting an internal issue.

• What it feels like: Feeling generally “flu-ish,” experiencing waves of nausea, or a low-grade fever.

• Worry less if: Nausea is very mild and clears within hours without a temperature.

• Seek prompt care if: Your temperature rises above 38°C (100.4°F) or you are vomiting. These are high-level indicators that a pouch has become infected (diverticulitis) or has caused a blockage.

5. Rectal Bleeding (Blood in Stool)

This is one of the more alarming symptoms and occurs when a diverticulum erodes a nearby blood vessel.

• What it looks like: Bright red blood in the toilet or maroon-coloured stools. It is usually painless but can be sudden.

• Worry less if: There is a tiny amount on the paper (often due to haemorrhoids), but even then, it should be mentioned to a GP.

• Seek immediate care if: You experience heavy bleeding, pass large clots, or feel dizzy, pale, and faint.

Diverticulosis vs. Diverticulitis: Know the Difference

When to Seek Emergency Care (Red Flags)

Go to A&E or call 999 if you experience these “Red Flag” symptoms:

• Rigid Abdomen: Your stomach feels hard and extremely painful to touch.

• Inability to pass waste: You cannot pass stools or wind (potential bowel obstruction).

• High Fever & Vomiting: Signalling a potential abscess or perforation.

• Severe Bleeding: Large amounts of blood or black, tarry stools.

Summary

Early diagnosis is the best way to prevent complications like abscesses or bowel perforations. If your gut health is changing, don’t wait for the pain to become unbearable.