Scarlet face: The human face is not only a stage for the performance of the seven emotions, but also a window reflecting the diseases in the body. Therefore, it is an important and easy way to detect diseases at an early stage. The scarlet fever face: the face is congested and flushed, and the skin around the mouth and nose is obviously pale. This symptom is a symptom of scarlet fever, an acute rash respiratory infection caused by a group A type B hemolytic streptococcus, which is known in Chinese medicine as “rotten throat cholera” and occurs mainly in the winter and spring. Any age can be affected, but babies between 2 and 8 years old are most likely to be infected. The actual fact is that the actual person’s face is natural, and the person’s demeanor is pleasant, when some disease is troubling, or when the disease has developed to a certain degree there can be some characteristic facial expressions, the sickly face is congested and flushed, the skin tone around the mouth and nose is obviously pale. The face of a healthy person should have two eyes, clear eyebrows and lustrous skin. ASO test: The ASO test is an anti-streptococcal hemolysin O test. Streptococcal hemolysin is one of the metabolites of hemolytic streptococci. After the human body is infected with this type of streptococcus, a large amount of anti-streptococcal hemolysin 0 (ASO) antibodies can appear in the serum.