Mild tricuspid regurgitation, usually due to pulmonary hypertension, leads to enlargement of the right ventricle, which, in contrast to the enlargement of the right ventricle, can cause tricuspid valve insufficiency. Severe tricuspid regurgitation can affect the patient’s hemodynamics and can lead to heart failure, liver enlargement, intestinal mucosal edema, and possibly indigestion and decreased food intake. The pathological changes of mild tricuspid regurgitation are due to the contraction of blood flow from the right ventricle into the right atrium, which gradually leads to the enlargement of the right atrium, and the pressure in the right atrium also increases, so there is an obstruction of venous blood return, so it will increase the load on the right ventricle and cause cardiac compensation and hypertrophy of the myocardium, which is most likely to induce right heart failure. Mild tricuspid insufficiency is not easy to detect clinically, but if the insufficiency progresses further, the patient may experience fatigue, reduced food intake, and in severe cases, pain in the liver area, abdominal distension, and edema of both lower extremities. Therefore, patients with mild tricuspid valve insufficiency should have their heart ultrasound and blood pressure reviewed regularly.