Tricuspid valve insufficiency is mostly a relative, functional insufficiency of the tricuspid valve due to various causes of right ventricular enlargement and valve annulus enlargement. The main causes of right ventricular enlargement are rheumatic heart disease and congenital heart disease, such as pulmonary stenosis, tetralogy of Fallot, and pulmonary heart disease. Patients with direct organic tricuspid valve closure insufficiency are relatively rare, such as infective endocarditis, tricuspid valve prolapse, endocardial myocardial fibrosis, tricuspid valve closure insufficiency when the right ventricle contracts, part of the blood flow can return to the right atrium, resulting in a rise in right atrial pressure, which causes difficulty in upper and lower vena cava reflux, causing stasis of the body circulation, resulting in a series of clinical manifestations such as hepatomegaly, body edema, and organ edema.