Patients with esophageal foreign body can be diagnosed based on typical clinical manifestations and auxiliary examinations, which include the following: 1. clinical manifestations: patients have a history of foreign body swallowing and show spasmodic painful facial expressions when swallowing saliva movements, hand holding the painful parts, coughing and even cyanosis; 2. auxiliary examinations: X-ray examination, X-ray examination can be performed for opaque foreign bodies such as metal or large dense bones; gastroscopy Gastroscopy can not only make a clear diagnosis, but also give active treatment to remove the foreign body; laryngoscopy, saliva retention in the pear-shaped fossa or arytenoid cartilage showing edematous elevation should be considered as a possible foreign body in the esophagus; CT examination can help detect small foreign bodies in the esophagus.