Patients with pain inside the undershirt while sleeping at night are commonly caused by the following conditions First, patients with gallbladder stones accompanied by cholecystitis, if they eat more greasy food at dinner, it will cause an acute attack of cholecystitis and result in radioactive pain in the undershirt. Patients need to go to the hospital as soon as possible, and the pain can be gradually improved by active anti-infection, antispasmodic, rehydration and other supportive treatments. Elective surgical treatment can completely avoid recurrent attacks of pain. Second, patients with coronary atherosclerotic heart disease have cardiac vasoconstriction, myocardial ischemia and hypoxia during sleep at night, which causes radiating pain in the undershirt. If the patient’s symptoms are not relieved in time, it is recommended to visit the hospital as soon as possible to avoid serious complications.