The diseases of the small intestine are complex and often difficult-to-diagnose conditions that require a deeper understanding for proper comprehension. Diseases affecting different sections of the gastrointestinal tract often present similar symptoms, making diagnosis not solely reliant on clinical signs. Anatomically, the small intestine and the large intestine are distinct, but functionally they are closely related, so certain diseases can affect both sections. Diagnosing gastrointestinal diseases requires various medical examinations, such as imaging procedures, endoscopies, and laboratory tests. A clear diagnosis necessitates a thorough analysis of the symptoms and mapping out possible causes, as different conditions can underlie similar symptoms. Therefore, addressing gastrointestinal issues requires more than just relying on…