The forehead is crossed by the temporal artery and is the only part of the body in direct contact with the brain and that is not covered by hair. Furthermore, the head is the first part of the body to change temperature as a fever, rises and falls. This characteristic is very useful, as it can give predictive information of how the fever is changing. This is why, sometimes, it is possible to find the fever on the forehead and not in other parts of the body or viceversa. This simply means that the fever is rising or falling.