What Does Diverticulitis Pain Feel Like?

Disclaimer: This article does not constitute medical advice. Always seek medical advice from a qualified medical practitioner if you are worried about symptoms, pain or changes in your health.

This article is based on anonymised discussions from our Facebook group.

In short, diverticulitis pain is often described as severe, deep and frightening, commonly felt on the lower left side of the abdomen, and for many people it is compared to labour pain or something even worse. It can come in waves or feel constant, may spread to the back or groin, and is often accompanied by bloating, nausea, fever or bowel changes. Importantly, people experience it very differently, which is a major source of confusion and anxiety. It is a good idea to record the dates and intensity of episodes, and you can do this in our food and symptoms diary.

Why Is It So Hard To Describe Diverticulitis Pain?

One of the clearest messages from the discussion is just how difficult people find it to put the pain into words. Many members said they felt frustrated trying to explain it to family or even doctors. Some worried they were “overreacting”, while others delayed seeking help because they assumed it was IBS, period pain or a stomach bug.

“It is impossible to accurately describe. It is so unique.” – Alan, Nottingham

This uncertainty is common and understandable. Diverticulitis pain does not always follow a neat pattern, and it can change from flare to flare.

This is echoed by members whose pain does not follow the pattern at all. One member, who has lived with diverticulosis for years, said her doctor has been direct with her about this: he told her that pain varies with every flare, so what she experiences one time is genuinely not a reliable guide to the next. Not knowing how to judge whether a particular episode needs a GP visit, antibiotics or a hospital trip is one of the most common sources of anxiety in the group.

Where Is Diverticulitis Pain Usually Felt?

Most people described pain on the lower left side of the abdomen, which fits with how diverticular disease commonly affects the colon.

However, many reported pain spreading or appearing elsewhere:

• • Left flank or under the ribs
  • Lower back
  • Groin or pelvis
  • Across the whole abdomen

“Left rib pain, back pain, awful sick feeling, knife sharp pains in the lower left abdomen.” – Maureen, Kent

Several people said the pain wrapped around the body or felt worse with movement, bumps in the road or even clothing touching the skin.

Not everyone’s pain settles on one side, though. “Darren from Fife” described being constantly in pain across both his stomach and his back for months following diagnosis, regardless of what he ate or which medication he tried. Several members pointed out that lower back pain running alongside stomach pain is, for them, one of the clearest signs that a flare is starting.

What Kind Of Pain Do People Experience?

The language people used was strikingly vivid. Common descriptions included:

Stabbing Or Knife-Like Pain

“Like a knife being put in your side.” – Christine, Essex

“Allison from Poole” described a similar sensation of shooting, sharp pains that came and went unpredictably, on top of continuing cramps, bloating and back pain, which had led her doctor to test for other conditions as well as diverticular disease, just to be sure nothing else was being missed.

Cramping Or Contraction-Like Pain

Many women compared it directly to labour.

“Strong, intense and spaced out like contractions.” – Tamacia, Birmingham

After being told by partners that this is what labour can feel like, many felt a new appreciation for childbirth.

Burning Or Searing Pain

“Hot burning sensation then sharp stabbing pain.” – Stephen, Leeds

Burning pain came up again and again in the wider discussion. One member described nearly two months of a burning sensation that antibiotics did nothing to ease. Another said it felt like her “colon was on fire” and that the burning made sleep almost impossible. A father of four described seven months of constant burning, bloating and pain following his diagnosis, on top of the exhaustion of caring for young children.

Deep Pressure Or Bruising Pain

“Feels like bruising deep inside. Movement irritates it.” – Ian, York

For some, the pain was constant and dull. For others, it came in waves that built to an unbearable peak.

How Severe Is Diverticulitis Pain On A Scale Of 1 To 10?

While a few people reported milder pain, the majority rated it between 8 and 10 out of 10 during a flare.

“Pain level 20.” – Laura, Bristol

Several people described passing out, vomiting or being unable to walk when the pain peaked.

Some members have found their own ways of coping with pain at this level while waiting for medical help. A few described spending long stretches of the day in a hot bath, sometimes three or four times in a single day, simply because it was the only position in which the pain eased. Others said a hot water bottle against the abdomen or lower back gave similar relief, and more than one member suggested this was less about the heat directly treating anything and more about easing the muscular tension that builds up around a flare.

Does Diverticulitis Pain Come With Other Symptoms?

Yes. Pain was rarely the only symptom. Members frequently mentioned:

• • Severe bloating or feeling “nine months pregnant”
  • Nausea and vomiting
  • Fever and flu-like body aches
  • Extreme fatigue
  • Diarrhoea or constipation
  • Feeling unable to pass wind or stool

“Pain, nausea, near passing out on the toilet. I thought I was dying.” – Pauline, West Midlands

These combinations often added to the fear, especially for those new to the condition. This overlap between pain and other digestive symptoms is well recognised clinically. According to an overview of diverticular disease from Germany’s Institute for Quality and Efficiency in Health Care, published via the US National Library of Medicine, common symptoms linked to diverticula include lower abdominal pain, flatulence, constipation and diarrhoea, alongside the general feeling of being unwell that so many members described.

Can Diverticulitis Pain Be Mistaken For Something Else?

Very often, yes. Many people initially thought they had:

• • Period pain or gynaecological issues
  • IBS
  • Food poisoning
  • Kidney stones
  • Appendicitis
    
    

“I thought it was IBS so I delayed going to hospital. I shouldn’t have.” – Susan, Oxfordshire

Several members in our wider community described a similar overlap with IBS specifically. One member, who lives with both conditions, said she now eats a strict low residue diet and avoids most fruit and vegetables on her doctor’s advice, because she cannot always tell which condition is responsible for a particular bout of pain and bloating. Another said her GP has told her that once diverticulitis and IBS coexist, the two conditions can effectively mask each other, which makes tracking personal triggers even more valuable.

This overlap is why medical assessment is so important, particularly if pain is severe, worsening or different from your usual pattern.

When Should Diverticulitis Pain Be Treated As Urgent?

You should seek urgent medical help if pain is severe, sudden, worsening, or accompanied by fever, vomiting, bleeding, fainting or an inability to move. Some members described perforations or abscesses that required emergency care.

This was one of the strongest and most consistent messages across the wider discussion. Several members described exactly this scenario: pain that was dismissed for weeks as a suspected UTI or simple constipation, only for a scan to later reveal a perforation requiring days of intravenous antibiotics in hospital. One member summed up the lesson simply: keep pressing for a scan if something feels wrong, rather than assuming the pain will settle on its own.

The NHS provides clear guidance on symptoms that need urgent attention, which you can read here.

Why Does The Unpredictability Cause So Much Anxiety?

A recurring theme was fear. People described never knowing when a flare would escalate or how bad it would become.

“Each flare felt different. Every one was a 9 or 10.” – Anon, Sussex

Living with that uncertainty can affect confidence, work, social life and mental health. Feeling believed and understood is a crucial part of coping.

This anxiety was made worse, in several accounts, by frustration with how quickly pain was taken seriously. More than one member described being sent away with only paracetamol and told to wait weeks for a routine scan, despite being in tears with pain in the GP’s office. Others found the opposite: same-day CT scans, immediate blood tests and antibiotics started within hours. This inconsistency in how quickly pain is investigated appears to be a genuine and recurring source of distress, on top of the physical symptoms themselves.

Key Takeaways

• • Diverticulitis pain is commonly severe and often described as stabbing, cramping or labour-like
  • Most people feel it on the lower left side, but it can spread to the back, flank, groin or across the whole abdomen
  • Pain intensity varies widely and can change between flares, which clinicians confirm is a genuine feature of the condition rather than a sign of poor self-monitoring
  • Associated symptoms like bloating, nausea, fever and changes in bowel habit are common, and are confirmed by both community experience and clinical overviews of diverticular disease
  • Overlap with IBS, gynaecological pain and other conditions is common and can make self-diagnosis unreliable
  • Severe or worsening pain should always be medically assessed, even without a fever, and even if a first assessment felt dismissive
    
    

Join The Conversation

If this article reflects your experience, you are not alone. Many people find reassurance in hearing how others describe their symptoms and how they sought help.

You can continue the discussion, ask questions or share your experience anonymously in our forum.

Disclaimer: this article does not constitute medical advice. Always seek medical advice from a qualified medical practitioner for diagnosis, treatment and guidance specific to your situation.