Blood fever is heat poison invades the blood and runs into the blood, often occurs in the tropics, or work in a very hot environment, or in the hot season, overexposure to sunlight, or excessive sweating, no supplemental water, prolonged thirst, loss of water, or eat fried, fried, and other hot and dry food, or take some stimulants, may lead to blood fever. Then the blood heat blazing mechanism, mainly in the following four aspects: First, the heat phenomenon: blood heat is mostly Yang Sheng is hot of the real, hot pathology and evidence, and show the heat phenomenon. Second, the blood line acceleration: the blood get hot line, can make the blood flow accelerate, and make the expansion of the pulse channel, veins congested, so can see the face red eyes red, tongue color deep red (that is, tongue reddish) and so on. Third, moving blood: on the basis of accelerating blood flow and expanding veins and channels, heat in the blood can burn the veins and channels and cause bleeding, which is called "heat forcing the blood to act rashly", or moving blood. Fourth, disturbing the mind: blood heat is blazing disturbing the mind, the heart of the blood and hidden God, the blood and the heart are connected, so the blood heat is disturbing the mind, and see upset, or disturbed madness and other symptoms. Specifically the symptoms of blood heat: skin flushing, love oil, easy to acne; love temper, palms, feet feel very hot; menstruation will be more than 7 days in advance, the amount of blood, the color of dark red or purple, or menstruation is longer, drenching; nose bleeds easily, dreamy at night.