Measurement of facial skin temperature.

It is essential to know the pattern of facial skin temperatures in normal subjects to be able to objectively assess differences in cases of nerve injury. Thirty healthy adults were selected at random to investigate the pattern of facial temperature using liquid crystal thermography and an electronic thermocouple system. The highest temperature of the face was in the forehead area (c, 34 degrees C) and the lowest (c. 32 degrees C) in the cheek area. If ambient temperature and humidity are controlled in a draught-free environment, symmetry of the facial skin temperature can be maintained. It is concluded that measurements of facial skin temperature may be used to investigate and assess lesions of peripheral branches of cranial nerves supplying the face.