Burst blood vessels may be caused by varicose veins, venous blood reflux obstacles, exertion and other reasons. 1. Varicose veins: such as deep vein valve insufficiency, superficial vein valve closure, etc., can lead to the occurrence of varicose veins, so that the venous blood reflux into the superficial veins, which leads to the phenomenon of blood vessel popping. 2. Obstruction of venous blood reflux: External pressure, thrombosis in the blood vessels, etc. can affect the venous blood reflux, leading to the rising pressure of venous blood, which results in venous vascular bulging. 3. Exertion: When a lot of sports or labor is carried out, it will lead to the expansion of blood vessels. When it protrudes from the surface of the skin, it can also appear as a vascular bulge. When found to have burst blood vessels occur, it is recommended to go to the hospital in time for examination, in order to clarify the cause of the disease, under the guidance of the doctor to actively carry out targeted treatment.