If the heart is uncomfortable and chest tightness, it is important to combine the characteristics of the symptoms, whether there are high-risk cardiovascular risk factors, and whether other tests have been done to aid in the diagnosis. clinically, there are the following diseases: 1. diseases of the circulatory system, more commonly known as coronary heart disease, angina pectoris, and activity-related chest tightness and chest pain, which can be relieved after rest. 2. diseases of the respiratory system, such as various pleurisy, pneumonia, 3, digestive system diseases, represented by reflux esophagitis, extraesophageal symptoms cause chest tightness. 4, chest wall diseases, often rib chondritis, rib neuralgia. 5, functional diseases, manifested as anxiety, depression, sleep disorders, etc., the common is neurosis.