What is it?

Gastritis, duodenitis, and Gastroenteritis (no infectious) describe the inflammation of different parts of the gastrointestinal system. Gastritis is the inflammation of the stomach, duodenitis is the inflammation of the first part of the small intestine (called the duodenum), and colitis is the inflammation of the large intestine (called the colon). The common causes for gastritis and duodenitis include infection with the bacteria Helicobacter pylori and increased use of non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen. Gastroenteritis (no infectious) Colitis may be caused due to immune disorders, smoking, injury, and various other factors. Complications of untreated gastritis, duodenitis, and Gastroenteritis (no infectious) include ulcers, bleeding, infections, and scarring.

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Additional names

This group contains additional names:
- Eosinophilic Colitis
- Eosinophilic Gastroenteritis
- Eosinophilic Gastritis
- Alcoholic Gastritis
- Duodenitis
- Gastric Mucosal Hypertrophy
- Gastritis with Hemorrhage
- Allergic Gastroenteritis and Colitis
- Toxic Gastroenteritis and Colitis
- Radiation Gastroenteritis and Colitis

Signs & symptoms

Symptoms of gastritis and duodenitis may include:
- Abdominal pain, mostly upper abdominal pain that can wake the patients at night.
- Bloating and indigestion.
- Nausea and vomiting.
- Changes in appetite and weight loss.
Symptoms of colitis may include:
- Persistent diarrhea.
- Abdominal Pain.
- Bloody stool or rectal bleeding.
- Rectal pain.
- Weight loss.
- Vomiting.


Diagnosis is made by questioning and investigating the medical history and physical examination to provide additional information and exclude other diseases. Further tests include:
- Stool sampling test.
- Endoscopy – a procedure that allows looking at the esophagus, stomach, and small intestine and taking a biopsy, using a special camera inserted through the mouth.
- Colonoscopy – a procedure that allows looking at the rectum, large intestine (colon), and small intestine and taking a biopsy, using a special camera inserted through the rectum.
- Ultrasound, CT, or MRI scans.
- Blood testing.


Treatment depends on the specific disorder and the cause of inflammation and includes antibiotics, acid reducers, and anti-inflammatory medication. Some life changes may also be advisable, such as limiting alcohol drinking, quitting smoking, and limiting the use of NSAIDs.

☝️ This is not a substitute for professional medical advice. Please consult with your physician before making any medical decision.

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