Symptoms

In Crohn's disease, any part of your small or large intestine can be involved, and it may be continuous or may involve multiple segments. In some people, the disease is confined to the colon, which is part of the large intestine.

Signs and symptoms of Crohn's disease can range from mild to severe. They usually develop gradually, but sometimes will come on suddenly, without warning. You may also have periods of time when you have no signs or symptoms (remission).

When the disease is active, signs and symptoms may include:

• Diarrhea
• Fever
• Fatigue
• Abdominal pain and cramping
• Blood in your stool
• Mouth sores
• Reduced appetite and weight loss
• Pain or drainage near or around the anus due to inflammation from a tunnel into the skin (fistula)

Other signs and symptoms

People with severe Crohn's disease may also experience:

• Inflammation of skin, eyes and joints
• Inflammation of the liver or bile ducts
• Kidney stones
• Iron deficiency (anemia)
• Delayed growth or sexual development, in children

When to see a doctor

See your doctor if you have persistent changes in your bowel habits or if you have any of the signs and symptoms of Crohn's disease, such as:

• Abdominal pain
• Blood in your stool
• Nausea and vomiting
• Ongoing bouts of diarrhea that don't respond to over-the-counter (OTC) medications
• Unexplained fever lasting more than a day or two
• Unexplained weight loss