Facial fever refers to an increase in facial skin temperature, often due to physical factors, mental factors, infection factors, allergy factors and other factors stimulation, resulting in facial skin capillary dilation, manifested as skin congestion and temperature increase, mainly including the following aspects: 1, environmental factors: people living in the plateau zone, due to the low partial pressure of oxygen in the plateau zone, long-term low oxygen environment resulting in facial skin capillary Dysfunction. The oxygen content of hemoglobin in capillaries is reduced, which leads to long-term capillary dilation. People who live in a cold environment for a long time, cold stimulation can also lead to long-term and persistent dilation of facial skin capillaries. Other causes such as sunlight exposure, strong sun exposure can lead to dilation and congestion of facial skin blood vessels, facial capillary dilation, followed by an increase in skin temperature; 2, physiological factors: after strenuous physical labor or sports activities, facial capillary dilation and congestion can also be manifested as facial skin heating accompanied by skin redness; 3, allergic factors: pollen in the environment, or individuals often use Allergies: environmental pollen, or individuals often use skin care products, cosmetics allergies, resulting in facial allergic inflammation, can also be manifested as facial skin damage accompanied by fever and other clinical symptoms. Usually need to pay attention to the care of facial skin, appear skin damage with fever clinical symptoms, should promptly to the regular hospital dermatology, by the dermatologist detailed examination, clear causes and diagnosis.