The protrusion of blood vessels in the forehead is a normal physiological phenomenon in most cases and does not require concern or further examination and treatment, which is common in the following three categories of people: 1. elderly people. 2. people who are frequently engaged in physical labor or physical exercise. 3. thin people, especially those who lose weight rapidly during the weight loss process. These three types of people will lose the supporting tissue and slightly dilate the veins under the skin due to the rapid reduction of subcutaneous fat. At the same time, due to the reduction of subcutaneous fat skin will also become thinner, so that the dilated veins are clearly revealed, there will be a situation of prominent forehead blood vessels. However, it is a completely normal physiological phenomenon in itself, so there is no need for further examination or treatment. Moreover, this condition is not associated with other diseases and there is no need to worry about it.