It is not good to flush the blood vessels. Flushing the blood vessels is a situation in which many elderly people wish to use drugs that dilate the blood vessels or improve circulation during the change of seasons to make a change in the state of the blood vessels and avoid serious vascular diseases, atherosclerosis and blockage of the blood vessels, which is a good wish. However, currently, according to the latest research, this approach is not useful to protect blood vessels, and due to the large volume of infusion and the side effects of the drugs, there may be, for example, heart failure or liver and kidney function damage, as well as the most serious allergic reactions, which outweighs the losses and instead increases the risk of infusion and the risk of sudden death.