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What Is Crohn’s Disease? Symptoms, Causes, and What to Do Next

Crohn’s disease is a chronic inflammatory condition affecting the digestive tract. It can cause digestive symptoms, fatigue, weight loss, and nutritional deficiencies. Although there is currently no cure, early diagnosis and treatment can help most people live full, active lives.

What Is Crohn’s Disease?

Crohn’s disease is a form of inflammatory bowel disease (IBD). It is a lifelong condition that most commonly affects the small intestine and upper part of the large intestine. Symptoms often alternate between flare-ups (when inflammation is active), and remission (when symptoms improve or disappear).

What Causes Crohn’s Disease?

There is no single known cause, but several factors may contribute to the disease:

• Immune system: The immune system mistakenly attacks healthy tissue in the gut wall, causing chronic inflammation.
• Genetics: Having a first-degree relative with IBD increases the risk, but does not mean Crohn’s will develop.
• Environment and lifestyle: Diet, stress, antibiotic use, and urban living have been associated with IBD. Smoking is an established risk factor and can worsen the condition.
• Gut microbiome: An imbalance in gut bacteria may contribute in people who are genetically predisposed.

Crohn’s can affect anyone. It is most commonly diagnosed between the ages of 15 and 35, with a second peak among people over 60. Rates have recently been rising across the Middle East and North Africa.

Common Symptoms

Symptoms vary depending on the location and severity of inflammation. Common signs include:

• Persistent or recurring diarrhea
• Abdominal pain and cramping
• Unintended weight loss
• Reduced appetite
• Fatigue
• Blood in the stool
• An urgent need to use the bathroom
• Mouth sores

Crohn’s can resemble irritable bowel syndrome (IBS), celiac disease, and food intolerances, which may delay diagnosis.

It may also affect other parts of the body. Some people experience joint pain, skin inflammation, eye problems, or liver complications.

How Is Crohn’s Disease Diagnosed?

There is no single test that confirms Crohn’s disease. Diagnosis may involve:

• Blood tests to identify inflammation, anaemia, and nutritional deficiencies
• Stool tests, including faecal calprotectin, to detect gut inflammation and help rule out infection
• MRI or CT scans to show the location and extent of inflammation
• Colonoscopy to examine the large intestine and collect tissue samples

An accurate diagnosis helps doctors select the most suitable treatment.

The Role of Laboratory Testing

Laboratory testing supports diagnosis and long-term management.

C-reactive protein (CRP) measures inflammation in the body, while faecal calprotectin reflects inflammation in the gut. These markers can help assess disease activity, treatment response, and possible flare-ups.

Blood tests can also detect certain deficiencies that are common when inflammation affects nutrient absorption, such as iron, vitamin B12, vitamin D, and folate deficiencies.

MedLabs’ NutriPATH analysis assesses micronutrient deficiencies, gut imbalances, and metabolic gaps. The results can provide information that you and your doctor can use when planning the next steps.

How Is Crohn’s Disease Treated?

Medication is the main treatment. The aim is to reduce inflammation, achieve remission, prevent complications, and maintain quality of life. Options include anti-inflammatory medicines, immune system suppressors, and biologics. The choice depends on disease location, severity, and individual response.

While diet does not cause Crohn’s disease, food choices may help manage symptoms. Keeping a food diary can help identify personal triggers. A dietitian experienced in IBD can also help prevent or correct nutritional deficiencies.

Likewise, stress alone does not cause Crohn’s disease, but it may contribute to flare-ups.

Surgery may be needed when Crohn’s causes bowel damage, blockage, fistulas, abscesses, or other complications. It does not cure Crohn’s, but it can provide lasting relief.

Living Well With Crohn’s Disease

Good management depends on consistency:

• Take medication as prescribed.
• Attend follow-up appointments.
• Monitor inflammation and nutritional markers.
• Pay attention to changing symptoms.
• Avoid smoking.
• Maintain adequate sleep and physical activity.
• Seek support when stress becomes difficult to manage.

When to See a Doctor

Consult a doctor if you experience:

• Abdominal pain lasting more than a few weeks
• Diarrhea that does not improve
• Blood in your stool
• Unexplained weight loss or fatigue
• A family history of IBD alongside these symptoms

Blood and stool tests can provide an initial view of inflammation, infection, anaemia, and nutritional status. Results should be interpreted alongside your symptoms and medical history.

Take the Next Step With MedLabs

Crohn’s can affect how the body absorbs essential nutrients. MedLabs’ NutriPATH analysis assesses micronutrient deficiencies, gut imbalances, and metabolic gaps, helping you and your doctor make informed decisions.

Book your NutriPATH test | Find a MedLabs branch near you

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare professional.

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