
When experiencing a diverticulitis flare-up, doctors often recommend a liquid diet for a few days, typically lasting 2-3 days. This liquid diet consists of clear liquids like broths, tea, and juice, and helps to calm inflammation and give the digestive system a break. After this initial phase, low-fiber foods can be gradually introduced, and eventually, a normal diet can be resumed. The duration of this process may vary depending on individual circumstances and the severity of the flare-up.
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What You'll Learn

A clear liquid diet is recommended for a few days
After this brief period, you should start to feel better, and it's important to slowly transition to solid foods. During this next phase, your doctor will likely recommend a low-fiber diet to help manage diverticulitis flare-ups and prevent constipation. Low-fiber foods include white pasta, white bread, white rice, and white crackers.
It's important to gradually increase your fiber intake over several days to weeks to avoid constipation and bloating. The goal is to return to a high-fiber diet, which can help decrease your risk of future diverticulitis episodes. High-fiber foods include whole grains, vegetables, and legumes. However, it's important to note that increasing your fiber intake can initially cause gas and bloating, so it's recommended to increase fiber intake slowly and ensure proper hydration by drinking plenty of water.
While recovering from a diverticulitis flare-up, it's also beneficial to eat small, frequent meals and include foods with anti-inflammatory properties, such as ginger, turmeric, and garlic. Additionally, basic self-care measures like avoiding alcohol and using a heating pad for pain can aid in managing diverticulitis flare-ups.
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Gradually add low-fibre foods
A low-fibre diet is often recommended after a diverticulitis flare-up. This flare-up could be severe or require surgery. After a day or two of a clear liquid diet, you can move on to low-fibre foods. This diet typically limits fibre intake to between 8 and 12 grams of fibre per day, depending on the severity of the flare-up.
However, it's important to note that this low-fibre diet is only temporary. Once you have recovered from the flare-up, your doctor will likely advise you to gradually increase your fibre intake again. This is because a high-fibre diet is beneficial in the long term and can help prevent future diverticulitis flare-ups.
When increasing your fibre intake, it's recommended to do so gradually over several days to weeks. This gradual transition is important to avoid constipation and bloating, which can be common side effects of a high-fibre diet.
- Start with a few substitutions: If you're currently eating a low-fibre diet, start by substituting a few low-fibre foods with high-fibre options. For example, you could try incorporating more whole grains, beans, legumes, and vegetables into your meals.
- Increase your fibre intake slowly: Don't rush into a high-fibre diet. Gradually increase the amount of fibre you consume over time to give your digestive system a chance to adjust.
- Stay well-hydrated: Fibre needs water to work effectively in your body. Make sure you're drinking enough water to keep your bowels healthy and functioning properly. Aim for about half your body weight in ounces of water per day. For example, if you weigh 180 pounds, aim for about 90 ounces of water.
- Be consistent: Consistently add more high-fibre foods to your diet over time. This gradual and consistent approach will help your body adjust and reduce the risk of side effects.
- Monitor your symptoms: During this transition, you may experience some extra intestinal gas, which is normal and not usually a cause for concern. However, if you develop a fever or other symptoms, or if your pain doesn't improve, be sure to consult your healthcare provider.
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Avoid high-fibre foods
The duration of a "few days" for a diverticulitis diet can vary depending on individual circumstances and the severity of the condition. During a diverticulitis flare-up, medical professionals may recommend a clear liquid diet for a day or two, followed by a transition to a low-fibre diet. The low-fibre diet is maintained until symptoms improve, and then a gradual progression back to a high-fibre diet is recommended to prevent future flare-ups. This gradual increase in fibre intake can take several days to weeks.
Now, let's focus on the topic of avoiding high-fibre foods:
During an acute diverticulitis flare-up, it is generally recommended to avoid high-fibre foods and instead opt for a low-fibre diet to help manage symptoms. Here are some guidelines and suggestions for avoiding high-fibre foods:
- Understanding Fibre Recommendations: It is important to understand the recommended daily fibre intake, which is typically around 25 to 35 grams of fibre per day for a high-fibre diet. During a flare-up, a low-fibre diet may restrict fibre intake to between 8 and 12 grams of fibre, depending on the severity of the symptoms.
- Choose Low-Fibre Grains: Opt for refined grains such as white rice, white bread, and white pasta. These grains have lower fibre content compared to their whole-grain counterparts. It is important to note that if you have gluten intolerance, avoid gluten-containing foods, even if they are low in fibre.
- Select Carefully Prepared Vegetables: While vegetables are typically high in fibre, there are ways to reduce their fibre content. Choose peeled and seeded vegetables, as this removes some of the fibre. Cooking vegetables can also make them easier to digest and reduce their fibre content. For example, peeled and boiled potatoes have a lower fibre content than their unpeeled, raw counterparts.
- Limit Legumes and Beans: Legumes, including lentils, chickpeas, and beans, are high in fibre and should be limited during a flare-up. Opt for low-fibre protein sources such as tofu, eggs, or lean meats if tolerated.
- Avoid High-Fibre Fruits: Fruits, especially those with edible skins and seeds, can be high in fibre. Avoid options like berries, apples, pears, and oranges. Instead, choose fruits that are naturally lower in fibre, such as bananas, melons, or peeled and canned fruits.
- Gradual Reintroduction: After the flare-up has subsided and with medical guidance, gradually reintroduce high-fibre foods back into your diet. Start with a few substitutions and slowly increase your fibre intake over time to prevent constipation and bloating. This gradual transition will help your digestive system adjust and reduce the risk of future flare-ups.
It is important to remember that the impact of fibre on diverticulitis can vary between individuals, and you should always consult with a healthcare professional for personalised advice and to ensure your nutritional needs are met during both flare-ups and remission periods.
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Drink plenty of water
While there is no specific timeline for how long a "few days" is in the context of a diverticulitis diet, it typically refers to a short period of a few days to a week during flare-ups. During this time, it is important to follow your doctor's recommendations and make gradual dietary changes to manage your symptoms and prevent future flare-ups.
Drinking plenty of water is an essential part of managing diverticulitis and preventing future flare-ups. Here are some detailed instructions and insights into why staying hydrated is crucial for diverticulitis:
The Role of Water in Diverticulitis Management
- Constipation Relief: Constipation is a significant contributor to diverticulitis. Drinking adequate water helps prevent constipation by softening stools, allowing for easier passage through the colon. This reduces pressure on the pockets in the colon walls, preventing inflammation and tears.
- Promoting Intestinal Health: Water is crucial for intestinal health. It helps keep the intestinal walls lubricated and supports the healing process during a flare-up. Water also aids in the efficient functioning of the gastrointestinal tract, reducing the risk of inflammation and irritation.
- Supporting Fiber Intake: Fiber is essential for managing diverticulitis, and adequate water intake is necessary for fiber to work effectively. Water helps fiber move smoothly through the digestive system, reducing the risk of intestinal blockages and promoting regular bowel movements.
- Reducing Flare-Up Severity: Staying hydrated can help reduce the severity of diverticulitis flare-ups. Water aids in digestion, metabolism, and toxin elimination, supporting overall health and reducing the risk of inflammation in the colon.
Recommendations for Water Intake
- Daily Water Goal: Aim for at least 64 ounces of water per day. This recommendation may vary depending on your level of physical activity and other health factors.
- Personalized Intake: According to Cater, a dietitian, the recommended water intake is about half of an individual's body weight in ounces. For example, a person weighing 180 pounds should aim for approximately 90 ounces of water per day.
- Clear Liquids: During the initial days of a diverticulitis flare-up, a clear liquid diet is often recommended. This includes water, clear broths, tea, and coffee without milk. After a few days, a gradual transition to a low-fiber diet is typically suggested.
- Gradual Increase: When increasing your fiber intake to manage diverticulitis, ensure you also increase your water intake gradually. This helps your body adjust to the higher fiber consumption and prevents dehydration.
In summary, drinking plenty of water is a crucial aspect of managing diverticulitis and preventing future flare-ups. It helps alleviate constipation, promotes intestinal health, supports fiber intake, and reduces the severity of flare-ups. Remember to stay hydrated by consuming adequate water throughout the day and following your doctor's recommendations for a clear liquid diet during the initial stages of a flare-up.
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Transition to a high-fibre diet
Start with a Low-Fibre Diet During Flare-Ups
During an active flare-up of diverticulitis, it is recommended to follow a clear liquid, full liquid, or low-fibre diet, depending on the severity. This gives your bowels time to rest and heal. A low-fibre diet typically limits fibre intake to between 8 and 12 grams of fibre per day. Clear liquids can include broth, tea, and juice, while a low-fibre diet includes white pasta, white bread, white rice, and crackers.
Gradually Increase Fibre Intake
After symptoms improve, start slowly adding more fibrous foods to your diet. This transition should occur over several days to a week or two to avoid gastrointestinal upset. Begin with a few substitutions, gradually incorporating more high-fibre choices into your meals. Whole grains, vegetables, legumes, and fruits are excellent sources of fibre.
Stay Well-Hydrated
Drinking plenty of water is crucial when increasing your fibre intake. Fibre needs water to function optimally in your digestive tract. Aim for about half your body weight in ounces of water per day. For example, if you weigh 180 pounds, strive for about 90 ounces of water daily.
Manage Expectations
It's normal to experience some gas and bloating during the transition to a high-fibre diet. These mild discomforts are not indicative of a diverticular flare-up. As long as you don't have a fever or other symptoms, there's no cause for concern. Staying hydrated will also help with these transitional symptoms.
Recommended Daily Fibre Intake
A high-fibre diet typically includes 25 to 35 grams of fibre per day. Most Americans get only 10 to 15 grams of fibre daily, which is insufficient. Slowly work towards meeting the recommended daily fibre intake to reduce your risk of future diverticulitis bouts.
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Frequently asked questions
A few days usually refers to 2-3 days on a liquid diet, after which you can transition to a low-fiber diet.
Clear liquids are recommended, such as broths, tea, and coffee without milk, clear juices, sports drinks, sodas, and water.
A low-fiber diet includes bland, easily digestible foods such as white pasta, white bread, white rice, and crackers.
It is recommended to start with 8-12 grams of fiber per day and gradually increase your intake by 5-15 grams daily until you reach a goal of 25-35 grams of fiber per day.
Yes, it is important to stay well-hydrated, especially when increasing your fiber intake. Drinking enough water helps keep your bowels healthy and functioning properly. Additionally, a food journal can be helpful to identify any trigger foods that cause discomfort.











































