Crohn's Disease: What It Is, Symptoms, Causes & Treatment

Written by Medicover Team and Medically Reviewed by Dr A Venkateshwar Rao , Gastroenterologists Medical

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Crohn's disease is a chronic inflammatory bowel disease (IBD) that causes inflammation in the digestive tract. It can lead to symptoms such as abdominal pain, diarrhea, fatigue, weight loss, and digestive complications over time.

What are the Different Types of Crohn's disease?

Crohn's disease is classified into five categories, each with a set of symptoms.

Ileocolitis

It is an inflammatory disease that affects the end of the small intestine (ileum) and a section of the large intestine (colon). Ileocolitis patients may have symptoms such as:

Diarrhea
Substantial weight loss
Abdominal ache or cramps in the lower and middle quadrants.

Ileitis

It is inflammation of the small intestine's final portion (ileum). Ileitis symptoms are similar to those of ileocolitis. Ileitis patients may sometimes suffer from fistulas (inflammatory abscesses) inside the lower-right belly. Symptoms include:

Diarrhea
Weight loss
Cramping
Abdominal pain

Gastroduodenal Crohn's disease

It damages the stomach and the first few inches of the small intestinal tract (duodenum). Patients may vomit if small sections of their intestine get clogged with gastroduodenal Crohn's disease. This is due to inflammation in the intestine. Its symptoms include -

Loss of appetite
Nausea
Loss of weight
Vomiting

Jejunoileitis

It involves inflammation of the middle section of the small intestine (jejunum). Patients with jejunoileitis may have the following symptoms:

Cramping after eating
Fistulas
Diarrhea
Stomach pain that might be intense at times

Granulomatous Colitis

It involves inflammation of only the colon. It can result in the formation of fistulas, ulcers, and abscesses around the anus. It also includes the following symptoms:

Skin lesions
Joint discomfort
Diarrhea
Rectal hemorrhage

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What are the Causes and Risk Factors of Crohn's Disease?

The precise cause of Crohn's disease is unknown. Previously, diet and stress were suspected to cause this disease. But doctors now know that these factors may only worsen the disease and not cause it.

Its development is most likely influenced by a number of variables, including inheritance and a dysfunctional immune system.

The immune system : A virus or bacterium could cause Crohn's disease, but scientists have yet to uncover such a trigger. When your immune system attempts to fight off the invading microbe, an aberrant immunological reaction causes the immune system to attack digestive tract cells as well.
Heredity : Crohn's disease is much more common in people who have a family member with this condition. Therefore, genes may have a role in predisposing people to this disease. However, most Crohn's disease patients do not have a family history of the condition.

Risk factors

Crohn's disease risk factors may include:

Age: Crohn's disease can strike at any age, but it is most likely to strike at a young age.
Ethnicity: Although Crohn's disease can affect people of any ethnicity, whites are at the highest risk, particularly those of Eastern European (Ashkenazi) Jewish origin.
Family background: If you have a first-degree relative suffering with Crohn's disease, including a parent, brother, or child, you are at a higher risk.
Smoking cigarettes: Smoking cigarettes is the most significant modifiable risk factor for Crohn's disease.
Nonsteroidal anti-inflammatory drugs (NSAIDs): Naproxen sodium (Aleve),Ibuprofen (Advil, Motrin IB, and others), diclofenac sodium, and other drugs can increase the risk of Crohn's disease.

When Should You See a Doctor for Crohn's Disease?

Consulting a gastroenterologist or general physician is important if you experience persistent digestive symptoms or signs that may indicate Crohn's disease.

Persistent abdominal pain
Blood in the stool
Nausea or vomiting
Chronic diarrhea that does not improve with over-the-counter treatments
Fever lasting more than one or two days without a known cause
Unexplained weight loss

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What are the Symptoms of Crohn's Disease?

Crohn's disease symptoms are frequent and they appear gradually. Certain symptoms could also worsen with time. Rarely, the Crohn's disease symptoms appear suddenly and rapidly.

Some of the initial symptoms of Crohn's disease include:

Diarrhea
The cramping in the abdomen
There is bleeding in your stool
Fever
Fatigue
Appetite suppression
Loss of weight
After a bowel movement, you have the feeling that your bowels are not empty.
Feeling to urinate frequently

It's possible to confuse these symptoms with those of other ailments, like food poisoning, stomach distress, or an allergy. If either of these symptoms persists, you should consult a doctor.

How is Crohn's Disease Diagnosed?

Typically, doctors do not use a single test to diagnose Crohn's disease. Various tests may be required to confirm the diagnosis. In addition, your doctor will ask you about your health and family history, as well as do a physical examination.

The following test methods may be used to confirm the diagnosis:

Blood and stool tests
Biopsy
Sigmoidoscopy, which includes inspecting the lower colon using a short, elastic tube-like instrument called a sigmoidoscope.
Colonoscopy which involves inspecting the colon with a flexible, tube-like instrument called a colonoscope.
Endoscopy is a procedure that involves sending a long, thin, flexible probe known as an endoscope down the esophagus to the stomach to examine the top portion of the gut.
A CT scan or barium enema X-ray may be used to detect abnormalities in the bowel.
Magnetic resonance imaging (MRI) is done to observe a fistula near the anal area or the small intestine.

What are the Treatment Options for Crohn's Disease?

There is no cure for Crohn's disease. The goal of treatment is to reduce inflammation in the intestines, avoid symptom flare-ups, and maintain remission.

Crohn's disease is treated by a gastroenterologist using medications, bowel rest, and surgery.

Medicines

Various drugs are used to treat Crohn's disease by reducing the inflammation. They include anti-inflammatory drugs, immune system suppressors, biologics for Crohn's disease, and antibiotics.

Some other remedies include anti-diarrheals, pain relievers, vitamins and supplements, and nutritional therapy.

Bowel rest

It includes consuming only certain liquids and not drinking or eating anything. This method allows the intestine to rest. It is done if the disease symptoms are severe.

Surgery

The doctor may suggest surgery if medications and other therapies do not relieve the Crohn's disease symptoms. Surgery provides only temporary relief because the disease can reappear again.

The best treatment plan includes surgery with the intake of medicines to reduce the risk of recurrence.

The treatment plan will be determined by:

Where is the inflammation?
The gravity of the problem
Any complexities
A person's reaction to prior treatments

Some people can live for many years without having any symptoms. Remission of Crohn's disease varies so significantly that it can be difficult to predict how effective treatment will be and how long remission will persist.

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What Is the Recovery Process After Crohn's Disease Treatment?

Recovery from Crohn's disease focuses on controlling symptoms, reducing flare-ups, and maintaining long-term remission.

Follow-Up Care

Regular check-ups with a gastroenterologist
Periodic blood tests or colonoscopy to monitor inflammation
Extra care for patients on immunosuppressants or biologics

Lifestyle & Diet Tips

Eat small, soft meals during flare-ups
Avoid spicy, oily, and high-fibre foods
Stay hydrated and take prescribed medicines without skipping
Quit smoking and manage stress through yoga or meditation
Track food triggers with a symptom diary

Long-Term Outlook

With the right treatment, many live in remission for long periods. Early care helps avoid complications like fistulas, malnutrition, or bowel blockage.

What Precautions Can Help Prevent Crohn's Disease?

Prevention

Don't smoke, it worsens symptoms
Eat a balanced diet; avoid known triggers
Stay active and manage stress
Get early screening if you have digestive issues or family history

Complications if Untreated

Intestinal blockage
Nutrient deficiencies
Fistulas and chronic diarrhoea
Increased risk of colon cancer

Dos and Don'ts

Crohn's disease is a type of inflammatory bowel disease (IBD) that includes symptoms like diarrhea, abdominal pain, weight loss, and fever. No exact cure is known and it can be diagnosed through blood and stool tests, colonoscopy, endoscopy, and medical imaging techniques.

Do's	Don'ts
Try meditation, yoga.	Smoking and having tobacco products.
Be alert for the symptoms.	Stay away from multivitamins.
Take dietician advice.	Eat processed foods, refined sugar, dairy products, coffee, and alcohol.
Stay hydrated.	Drink less water.
Keep an emergency kit ready.	Eat large meals.

The disease could be taken care of with the help of medications and surgery. Follow the do's and don'ts for Crohn's disease because it can help to prevent the severity of the symptoms and keep the disease under control.