Jugular vein varices may be caused by heart failure, but other diseases can also cause jugular vein varices, need to improve the relevant examination under the guidance of the doctor to clarify the cause. Heart failure can cause jugular venous distention, jugular venous distention indicates that the pressure in the jugular vein increases, which is an abnormal pathological phenomenon. Since the jugular vein is directly connected to the pressure in the right atrium, it can reflect the pressure and volume changes in the right atrium. Because the right jugular vein is shorter than the left jugular vein and is a direct continuation of the superior vena cava, the right jugular vein is more reflective of pressure changes in the right atrium than the left jugular vein, and it is more common in patients with right heart failure. However, the cause of jugular venous insufficiency is not only due to heart failure, but other diseases may also cause jugular venous insufficiency. For example, acute and chronic pericarditis, tumor infiltration and metastasis involving pericarditis, hypothyroidism, cardiac trauma, constrictive pericarditis, superior vena cava syndrome, etc. will limit the right atrial and ventricular diastole, resulting in obstruction of superior vena cava reflux, resulting in increased jugular venous pressure, which is manifested as jugular vein varices. Therefore, patients with jugular vein varices are advised to consult a doctor in time, complete the relevant examinations under the guidance of the doctor to clarify the cause of the disease, and then actively carry out the treatment according to the cause of the disease.