The disease is most common at the bottom of the small intestine and the beginning of the large intestine, but may occur at any point in the digestive system. The cause of Crohn's disease is unknown, but bacteria and viruses may play a role in developing Crohn's disease. It may be the result of the body's abnormal reaction to normal bacteria in the digestive system. Smoking and family history may also play a role in the development of Crohn's disease.

Symptoms of Crohn's disease may include stomachache and diarrhea. Blood may be present in diarrhea or stool, and some patients will experience weight loss. Other symptoms may include anal tears, mouth sores and blockage of bowels.

Certain factors, such as stress, smoking, hormones and infection may cause a flare up in symptoms. Signs that Crohn's disease is worsening include feeling faint, a fast or a weak pulse, fever, chills, excessive vomiting and severe stomach pain. If these symptoms are present, contact a doctor right away.

The disease is diagnosed by using X-rays and physical exams to determine if Crohn's disease is present. A colonoscopy, biopsy and stool analysis may also be used to diagnose the disease.

Mild cases of Crohn's disease may be treated with over-the-counter medications to treat diarrhea, but a doctor may be able to determine if this is an adequate treatment. Treatment depends on the severity of symptoms and the type of symptoms present.

In severe cases of the disease, prescription medicines may be required. Receiving medication through an IV may also be necessary. In some cases surgery may be required to remove part of the intestine.

Avoiding sugars, smoking and eating healthy and exercising may help to alleviate some of the symptoms of Crohn's disease. A doctor may be helpful in advising further lifestyle changes.

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