Question

Why does the doctor advice to put strip of wet cloth on the forehead of the person having high fever?

Answer 1

Wet strips absorbs heat from the body and decrease the temperature of the body.
Hence to reduce the body temperature, doctors advice to put strips of wet cloth on the forehead of a person having high fever.

Answer 2

When a person has fever his body temperature becomes more than the normal body temperature. If we put strips of wet cloth on the forehead of a person suffering from high fever, the water evaporates taking heat from the body, creating a cooling effect. Thus, moist strips will lower his body temperature.