Subcostal pain is mostly considered as costochondritis, trauma, heart disease, pleurisy, cholecystitis, gastric ulcer and so on. 1. Costal chondritis: can be secondary to trauma, infection, etc., manifested as swelling and pain in the anterior chest wall, with obvious localized pressure pain, and there is no difference in the incidence rate between left and right sides. 2. Trauma: local soft tissue injury or rib fracture caused by collision, etc., which may manifest as chest pain, chest tightness, etc., and the pain may be aggravated when coughing or changing position, and localized skin lesions or bruises can be seen. 3. Heart disease: such as angina attack, manifested as chest tightness, chest pain, chest tightness, etc., the pain can be radiated to the left under the ribs and other parts. 4. Pleurisy: Inflammation invades the pleura causing chest pain, chest tightness, etc. Tuberculous pleurisy is also accompanied by low-grade fever, night sweats and other systemic symptoms. 5. Cholecystitis: right subcostal pain can be seen in liver and gallbladder diseases, such as cholecystitis, mostly manifested as epigastric distension and discomfort, and when the pain is severe, it can radiate to the back of the right shoulder, and it can be triggered by full meal or eating greasy food. 6. Gastric ulcer: pain can be located in the left subcostal area, mostly in half an hour or an hour after meals, can last several minutes or hours, accompanied by indigestion, loss of appetite and other symptoms. Subcostal pain can also be seen in other diseases, it is recommended that patients seek medical attention in a timely manner, so as to avoid delaying the condition.