Scarlet fever is a contagious disease of the respiratory tract, an infection with the bacterium Streptococcus pyogenes, which mainly affects children, usually under 15 years of age. Symptoms begin with an incubation period. At the beginning, there may just be some headache, sore throat and other atypical discomfort, which is usually considered to be an upper respiratory tract infection, or a cold, and the general onset of the disease is fever, and fever is inevitably chills, that is, chills before the fever, and the body temperature is usually high, accompanied by some systemic symptoms of toxicity, such as headache, generalized aches and pains, and loss of appetite. It is easy to be mistaken for an acute upper respiratory tract infection because the tonsils will have some secretions and the throat will be swollen. 1-2 days after the onset of the disease, the rash is actually the most important clinical symptom of scarlet fever. The rash basically starts from the head and face, such as behind the ears or neck, then gradually spreads to the chest, back and upper limbs, and finally to the lower limbs, and usually takes a few days to spread to the whole body. Typical rashes, a kind of skin congestion, so there is a needle cap on top, the size of the tip. There is also prune tongue is also a typical symptom, the beginning of the tongue moss white, the tongue on the papillae red and swollen, protruding above the white moss, after the white moss off, revealing bright red tongue, similar to prunes, called prune tongue. Basically after a week are beginning to be in the recovery period, the last is not to leave pigmentation, should the symptoms recover or better, avoid airborne.”