The blood vessels are getting clearer and clearer in two cases: First, the age-related changes, with the reduction of subcutaneous fat and thinning of the skin, make the blood vessels under the skin more and more clear, this is a physiological aging process, no need to treat and no need to care. Second, long-term exercise or physical labor, because the muscle demand for oxygen and nutrients increase, so the arteries expand, and the blood supply increases at the same time the amount of venous blood return will also increase, so it will cause venous expansion and make the blood vessels more and more clear, this situation is also a physiological change, and the body adapt to, also do not need to be treated.