If varicose veins are left untreated for a long time, they will become heavier and heavier with time and later on complications will be formed, the common complications are as follows: 1. Formation of lower limb vein thrombosis into, the most common is superficial vein thrombosis, there will be blood clots in the bulging veins, they will become hard, red and painful, this means the formation of superficial lower limb vein thrombosis. The superficial vein thrombosis with inflammation will also cause the formation of deep vein thrombosis as the clot falls off with the patient’s activity; 2. Long-term varicose veins can cause complications such as rash, pigmentation or ulcers in the lower limbs; 3. Patients with long-term varicose veins will unconsciously scratch at night when they sleep because of itching, which will rupture the varicose blood vessels and cause hemorrhage and even endanger their lives.