A woman’s chest has green veins normal. If a girl’s body is thin, chest wall fat is less, or often fitness, fat rate is lower, and the skin is fairer, you can see the veins appear, this is a normal situation. Due to the superficial location of the chest wall veins and their branches, when the chest wall fat content is low, it can be protruding from the skin. This condition has little to do with gender and is related to the fat content of the chest wall. People are advised to relax and not to be overly anxious or stressed by this. If the body is too thin, one may consider adjusting the diet and increasing exercise to increase the fat content appropriately. However, if the blood vessels seen are too tortuous and obviously protrude from the chest wall, it may be due to heavy stenosis of the vena cava, or obstruction of the vena cava, and patients are advised to seek medical treatment in time for a clear diagnosis and targeted treatment.