The forehead is not hot on the body temperature of 38.5 is a moderate fever, usually consider factors such as forehead insensitivity, external factors, hand temperature and so on. 1. forehead insensitive: sweat glands or capillary network in the forehead is not obvious distribution, so the hand on the forehead temperature measurement can not sense the temperature increase, also can not indicate that there is no rise in body temperature, the need to take the thermometer shall prevail. 2. Influenced by external factors: the forehead temperature is easily influenced by external factors, the forehead is exposed, more heat dissipation when the fever, the forehead may not appear hot. 3. Higher hand temperature: The temperature of the hand is higher, and you can’t feel whether the forehead is hot or not. Therefore, it is inaccurate to use the hand to touch the forehead to determine whether the fever, need to use a thermometer to determine, if there is fever, it is recommended to go to the regular hospital for examination, according to the cause of the disease as well as the symptoms of the selection of appropriate drug treatment.