A bezoar is a tightly packed collection of partially digested or undigested material that most commonly occurs in the stomach. It may be found in any part of GIT. Bezoars are responsible for 0.4%–4% of cases of mechanical intestinal obstruction. The clinical findings of bezoar–induced ileus do not differ from those of mechanical intestinal obstruction due to other causes. Gastric bezoars can occur in all age groups and often occur in patients with behavioural disorders, abnormal gastric emptying, or altered gastrointestinal anatomy. Many bezoars are asymptomatic, but some causes symptoms.. The appearance and localization of bezoars can be established with various imaging methods.Treatment of choice depends on the localization of the bezoar which makes the clinical findings.Some bezoars can be dissolved chemically, others require endoscopic removal, and some even require surgery. A pseudobezoar is an indigestible object introduced intentionally into the digestive system ,such as a gastric balloon for reducing the size of stomach. AIM– This review aims to summarize the definition and history, causes of bezoar formation, clinical findings, diagnostic methods, treatment of the rare intestinal obstructions caused by bezoars.