Your small intestine is the longest part of your digestive system - about twenty feet long! It connects your stomach to your large intestine (or colon) and folds many times to fit inside your abdomen. Your small intestine does most of the digesting of the foods you eat. It has three areas called the duodenum, the ileum, and the jejunum.
Problems with the small intestine can include:
Bleeding
Celiac disease
Crohn's disease
Infections
Intestinal cancer
Intestinal obstruction
Irritable bowel syndrome
Ulcers, such as peptic ulcer
Treatment of disorders of the small intestine depends on the cause.