What Is Diverticulitis?Lower Left Belly Pain With Fever

It’s not like the usual stomach ache. The pain sits low on the left, steady and sharp enough that you can’t straighten up. Within hours you’re running a fever and you’re nauseated. You think back to what you ate, and you wonder if you should wait it out.

Pouches versus a flare

The NIDDK¹ says diverticula often cause no symptoms. When they do, symptoms can include bloating, constipation or diarrhea, and cramping or pain in the lower abdomen. Because those overlap with other conditions, the NIDDK says to see a doctor for chronic belly symptoms, since irritable bowel syndrome shares them. See IBS.

Diverticulitis is different. The NIDDK¹ says it brings abdominal pain, most often in the lower left side, with fevers and chills, nausea or vomiting. It says the pain is typically severe and comes on suddenly, and that acute symptoms need prompt medical evaluation.

Who gets it

The NIDDK² lists a diet low in fiber and high in red meat, lack of physical activity, obesity, smoking, certain medicines including NSAIDs and steroids, and genetics. See constipation for fiber basics.

What to eat

The NIDDK² says a low-fiber, high-red-meat diet may increase your risk, and that the Dietary Guidelines recommend 28 grams of fiber a day for a 2,000-calorie diet. It says to increase fiber gradually. Examples it gives include whole grains, beans, legumes, fruits and vegetables, with a cup of raspberries at 8.0 grams and a cup of green peas at 8.8 grams.

On nuts, popcorn and seeds, the NIDDK² says more recent research suggests they are not harmful for people with diverticulosis or diverticular disease, which reverses older advice. It suggests talking with your doctor about whether to change what you eat and drink.

How it’s treated

For uncomplicated diverticulitis, the NIDDK³ says home treatment usually includes a clear liquid diet for a short time to rest the colon, pain relief with antispasmodics or acetaminophen rather than NSAIDs, and antibiotics, though they’re not always necessary. For complicated cases, you may need hospital care, and if symptoms don’t improve, you may need surgery to remove part of the colon, called a colectomy.

The NIDDK³ lists complications: bleeding, an abscess, and fistulas, obstruction or perforation, which usually need surgery. To lower your risk of recurrence, it recommends a high-fiber, low-red-meat diet, regular activity, not smoking and a healthy weight.

The play

Try this: a fiber check

This is general prevention or recovery information, not a diet plan for an acute flare. If you have acute pain, fever, or suspected diverticulitis, seek medical assessment and follow your clinician’s diet instructions.

For three days, write down every food with fiber: whole grains, beans, fruit, vegetables. Estimate your total against the NIDDK’s² 28 grams for a 2,000-calorie diet.

If you’re far below, add one fiber food a day for a week rather than all at once, and drink water with it.

If you’ve had diverticulitis, ask your doctor what’s right for you.

When to get checked

Don’t wait if

1. Urgent

   Blood in your stool, or pain that gets worse quickly, needs urgent care. The NIDDK¹ lists bleeding as a complication that may need a colonoscopy or surgery.

Book an appointment if any of these fit:

• Lower belly pain, especially on the left, that comes on suddenly or is severe
• Pain with fever, chills, nausea or vomiting
• Ongoing bloating, constipation or diarrhea with lower belly cramping
• You’ve been told you have diverticula and have new symptoms
• You take NSAIDs regularly and have lower belly pain

A flare has a pattern: low, left, sudden, with fever. Know the pattern, and the call is easy.