There are many causes of facial fever, the common ones are as follows: first, fever caused by various reasons, when the body is feverish, the facial temperature will also increase; second, facial capillary dilation, when tension and excitement, the facial capillaries will be congested and the feeling of facial fever will appear; third, facial diseases caused by, for example, facial hormone dependent dermatitis, rosacea, rosacea, facial contact allergic dermatitis, facial dermatitis, etc.; fourth, other factors caused by, for example, high ambient temperature, sun exposure, etc.