The outside of the heart has two layers of pericardium, the dirty layer and the wall layer, and if they undergo inflammatory changes, it is called pericarditis, which can cause pressure on the heart and restrict the diastole. Pericarditis can be divided into two categories: acute and chronic, and the more serious type of chronic pericarditis is constrictive pericarditis. Pericarditis can be divided into two categories, including acute pericarditis and chronic pericarditis, which occur for different reasons: 1. Acute pericarditis can be caused by infection, connective tissue abnormalities, metabolic abnormalities, injury, myocardial infarction, or certain drugs, or can be nonspecific. 2. Chronic constrictive pericarditis is usually nonspecific, but almost any acute pericarditis can be its cause. Common causes are tuberculosis or other infections, neoplastic organisms, radiation from sunlight or sound, rheumatoid arthritis, trauma, and cardiac surgery. Rheumatic fever is rarely followed by constrictive pericarditis. Clinical prevention of this disease mainly consists of active treatment of primary diseases, such as tuberculosis, rheumatic fever, sepsis, etc. At the same time, exercise should be strengthened to improve the body’s resistance. Be cautious in starting and living, moderate diet, and regulate emotions.