There are many causes of facial heat, including excessive exercise, capillary dilation, facial diseases, high temperature, cholinergic urticaria, etc. 1. Excessive exercise: after a lot of exercise, the body will cause the body to heat up, and the temperature of the face, will also rise significantly, and you will feel hot face. 2. capillary expansion: the most important reason for the face fever, is due to capillary expansion, such as nervousness, excitement or shame, the face capillary congestion, expansion, caused by the face fever. 3. Facial diseases: the existence of diseases can not be ruled out, such as facial hormone-dependent dermatitis, rosacea, facial contact allergic rhinitis, etc., may lead to facial fever. 4. High temperature: belongs to the more direct cause, due to the high temperature of the environment, when the sunlight is directly irradiated, it will lead to the face to be affected by a certain amount of facial fever. 5. Cholinergic urticaria: due to mental stress, eating hot drinks or alcoholic beverages, etc., resulting in cholinergic nerve impulses and release of acetylcholine, localized redness around the skin of varying degrees, the appearance of facial heat. Special attention should also be paid to the fact that drinking alcohol can also cause hot face. Normally, you need to develop good habits, and if you have any discomfort, you need to consult a doctor in time.