The obvious blood vessels on the forehead are generally related to the following factors: first, emotional excitement. Second, engage in heavier physical labor or physical exercise. Third, high blood pressure. Suddenly obvious blood vessels on forehead cannot be fully judged as pathological or physiological condition, both conditions may cause obvious blood vessels on forehead. So in this case, you can check your blood pressure and control to adjust your emotions, as well as temporarily reduce physical labor or reduce the intensity of physical exercise, and observe whether the blood vessels on the forehead can be reduced. If the blood vessels continue to be more pronounced, routine monitoring of blood pressure should be performed to determine whether pathological phenomena exist.