Facial redness and fever can be caused by a variety of reasons and cannot be generalized, such as disease factors, drug factors, etc. that cause facial redness and fever, and patients are advised to visit a hospital to clarify the cause. In addition, if the patient’s facial redness and fever are caused by emotions, sports, etc., no special treatment is needed. Specific analysis of the specific situation, there are mainly the following possibilities: 1. physiological factors: 1. emotions: in a state of tension, excitement, anger, the blood flow rate increases, thus the symptoms of facial redness and swelling and fever can appear; 2. exercise: after exercise sympathetic excitement, the face will have redness and swelling and fever; 3. diet: after the intake of spicy food as well as alcohol, stimulate the body’s capillary dilation, blood flow is accelerated. So cause facial redness, heat and swelling. External factors: 1, climate: facial skin is thin, rich in blood vessels, in hot and cold climate, will cause capillary abnormalities, resulting in redness, swelling and fever; 2, terrain: in higher altitude areas, due to thin air, low oxygen content, skin oxygen absorption is insufficient. Coupled with greater sand and strong ultraviolet radiation, so that facial skin sensitivity, redness, heat and swelling; 3, physical and chemical factors stimulation: sensitive skin people in the physical, chemical and other stimuli, skin tingling, itching, redness, swelling and other abnormal symptoms. Third, drug factors: If patients use glucocorticoids for a long time, it may cause glucocorticoid-dependent dermatitis, and the facial complications are tingling or swelling sensation, as well as redness and heat. Four, disease factors: 1, fever: patients by viruses, bacteria and other infections caused by fever, increased heat production in the body, resulting in facial fever, redness and other symptoms; 2, seborrheic dermatitis: seborrheic areas of inflammatory skin disease, the patient’s seborrheic areas of the subjective feeling of redness and heat; 3, contact dermatitis: the patient’s skin surface will appear erythema, swelling, papules and other reactions, burning sensation, swelling and pain, the Red heat is obvious; 4, Rosacea: chronic inflammation often occurs in the nose and perinasal area, which is obvious when eating irritating food, sudden changes in temperature and mental excitement, manifesting as facial redness and heat; 5, Hypertension: high blood pressure appears vasodilatation, causing local capillary congestion, resulting in the patient’s facial redness and heat swelling. Patients prone to facial redness and fever have many things to pay attention to in terms of diet and living habits. In terms of diet, they should drink more water and avoid spicy stimulation and alcohol consumption. In terms of life, one should be regular, ensure sufficient sleep, avoid triggers of facial redness and swelling and fever, and maintain a relaxed mood to achieve prevention through daily care.