Stomach pain is often related to the digestive tract and not much to the heart, but there is a group of people whose stomach pain is considered to be related to the heart is patients with coronary heart disease, most patients with coronary heart disease have pain in the precordial region or behind the sternum, but a small number of patients will have radiating pain, the radiating pain is mainly concentrated in the left upper limb or the left shoulder and back, and rarely radiates to the right side of the chest or the right upper limb, but there are also some people who will show However, some people may have pain in the abdomen without pain in the chest, or tightness in the throat without pain in the chest, which are atypical symptoms of angina pectoris. From this, we can learn that patients with coronary heart disease and angina can have pain in the precordial region, posterior sternum, left shoulder back, left upper limb, and abdomen or throat. On the contrary, for patients with stomach pain, the abdominal pain is usually increased after activity, but it can be improved quickly after rest or stopping activity, so it may not necessarily be considered a digestive system disease but may also be related to the heart, and it is necessary to go to the local hospital internal medicine or cardiology department for further differential diagnosis.