Most mild diverticulitis flares can be managed at home with a combination of bowel rest, careful eating, and the right pain relief. Current guidelines from the American Gastroenterological Association confirm that otherwise healthy adults with uncomplicated diverticulitis don’t always need antibiotics, and many recover within a week using diet and symptom management alone. Here’s how to handle a flare from start to finish.
Start With Clear Liquids
The first step during a flare is giving your colon a break. For the first few days, stick to clear liquids only. This reduces the workload on your digestive tract and lets the inflamed pouches begin to calm down. Good options include chicken, beef, or vegetable broth, pulp-free fruit juices like apple or grape juice, water, tea or coffee without cream, and plain soda.
Don’t stay on clear liquids for more than a few days unless you’ve been told otherwise by your doctor. You need calories and nutrients to heal, and prolonged liquid-only diets can leave you feeling weak and slow your recovery.
Transition Back to Solid Food Gradually
Once your pain starts improving, typically after two to three days, begin adding low-fiber foods back into your diet. The goal is to ease your digestive system back into work without irritating it. Think white rice, plain pasta, eggs, cooked vegetables without skin, applesauce, and refined breads. These foods move through your system without much bulk, which matters while the inflammation is still settling.
As symptoms continue to fade over the following days, slowly reintroduce more variety and fiber. There’s no strict gram-per-serving cutoff during this phase. Let your body guide you: if a food causes cramping or worsens discomfort, scale back and try again in a day or two.
Managing Pain Safely
For pain relief during a flare, acetaminophen (Tylenol) is the safest choice. Avoid ibuprofen, naproxen, and aspirin. Studies suggest these NSAIDs may increase your risk of future flare-ups and can potentially worsen inflammation in the colon wall. Stick to acetaminophen at the dose listed on the label and don’t exceed the daily maximum.
A heating pad on your lower left abdomen, where diverticulitis pain most commonly hits, can also help. Use it on a low or medium setting for 15 to 20 minutes at a time. Some people find that lying on their left side with knees drawn slightly upward eases pressure as well.
Stay Hydrated
Hydration is especially important when you’re on a restricted diet and your body is fighting inflammation. Water, broth, and diluted juices all count. If you’re spending a couple of days on clear liquids, you’ll need to be more intentional about fluid intake than usual since you’re not getting water from solid food. Aim to drink steadily throughout the day rather than in large amounts at once, which can cause bloating.
Do You Need Antibiotics?
This has changed significantly in recent years. The American Gastroenterological Association now recommends that antibiotics be used selectively rather than routinely for mild, uncomplicated diverticulitis in otherwise healthy people. Many patients recover without them. However, antibiotics are still advised if you have other health conditions, a weakened immune system, symptoms that aren’t improving after a few days, or signs of a more serious infection like high fever or vomiting. If your doctor prescribed antibiotics for a previous flare, that doesn’t necessarily mean you’ll need them every time.
Signs You Need Medical Attention
Home treatment is appropriate for mild flares, but certain symptoms mean the situation has escalated. Get medical care if you have constant, unexplained abdominal pain that isn’t responding to rest and acetaminophen, a fever, or notable changes in your bowel habits such as bloody stools or an inability to pass gas. Severe diverticulitis typically requires antibiotic treatment in a hospital setting, and complications like abscesses or perforations need imaging and sometimes procedures to resolve. Don’t try to push through worsening symptoms at home.
Preventing Future Flares
Once you’ve recovered, what you eat long-term matters more than what you eat during the flare itself. A high-fiber diet is the single most effective dietary strategy for reducing recurrence. Fruits, vegetables, whole grains, beans, and legumes should become staples. Most adults benefit from 25 to 35 grams of fiber per day, but if your current intake is low, increase gradually over several weeks to avoid gas and bloating.
One outdated piece of advice you can safely ignore: the old rule about avoiding nuts, seeds, popcorn, and corn. There is no evidence that these foods lodge in the pouches or trigger flare-ups. In fact, nuts are now recommended as part of a high-fiber diet for people with diverticular disease.
Regular physical activity also appears to lower the risk of recurrence. Even moderate exercise like brisk walking helps maintain healthy bowel motility, which reduces pressure inside the colon. Combined with adequate fiber and hydration, this forms the foundation of long-term prevention.