What are varicose veins? Varicose veins (commonly known as “floating hamstrings” – “rotten legs” – “earthworm legs”) are the most common disease of the venous system. The main cause of varicose veins is the accumulation of blood in the lower extremities due to maintaining the same posture for a long time with few changes, which results in excessive venous pressure due to the destruction of the venous valves over time. Most varicose veins occur in the lower extremities, where the skin of the leg appears red or blue – like spider webs – twisted blood vessels, or hard nodules like tree tumors, and the veins become abnormally enlarged and swollen and varicose. What types of people do varicose veins like? (1) People who work on their feet a lot; (2) Pregnant women; (3) Patients with deep vein thrombosis; (4) Patients with pelvic tumors; (5) People with calf vein injuries; (6) Elderly people and people with congenital weakness of the vein walls. The harm of varicose veins? 1.Distension, soreness and itching of lower limbs; 2.Difficulty in healing of skin ulcers; 3.Large bleeding of veins; 4.Formation of thrombus, which can enter the pulmonary artery along the blood circulation and cause pulmonary embolism, and even endanger life.