Early childhood emergency rash, also known as infantile rose rash, is commonly caused by herpes simplex virus type 6 and 7 (HHV-6 and 7), as well as other enteroviruses, adenoviruses, parainfluenza virus type 1, etc.; it is mostly seen in infants and young children, with a high incidence from June to 13 months, and 90% of the onset before the age of 2. Especially, the first fever is common in babies aged 6-7 months, with typical manifestations of high fever for 3-5 days (sometimes the body temperature can reach The typical presentation is a high fever for 3-5 days (sometimes up to 40 degrees or more) and a rash after the fever subsides. It seems very simple, but the diagnosis of this disease is not confirmed until the disease is well. The typical case is usually a sudden onset of fever with a temperature of 39 degrees or even 40 degrees, which can be accompanied by respiratory symptoms such as runny nose, cough, red throat, etc., but they are not too obvious and are basically mild symptoms. However, despite the high fever, generally speaking, the child is still in good spirits and is as lively as usual after the fever subsides, and should eat and play. There is no specific manifestation of laboratory examination, generally we need to check the blood routine, CRP, etc. If necessary, we can check EEG, lumbar puncture, ECG, chest X-ray, abdominal ultrasound, etc., also to exclude other diseases. Most of the routine blood tests for this disease are low or normal white blood cells (what we commonly call low or normal blood count), low or normal granulocytes, and a few will have reduced platelet count, which is common to many viral infections, so there is no specificity. Then comes the rash phase. After 3-5 days of fever, the body temperature drops abruptly, and the rash is issued, a red macular rash or corn rash that recedes when pressed. In addition to the typical feature of a fever that subsides, it is also a feature of the disease that the child’s mental state, appetite, and activity are generally good, despite repeated high fevers. It is important to mention here that I have encountered some doctors who may not be aware enough to treat this rash as a drug rash, causing the child to be afraid to use drugs in the future, as drug rash can be accompanied by itching, and is not an infectious disease such as measles or scarlet fever. The actual fact is that you can only get rid of the fever and treat it symptomatically, eat lightly, drink more water and maintain the water-electrolyte balance, and wait for the fever to subside and the rash to get better naturally. Generally, antibiotics are not needed, but antiviral drugs can be used, but there is no specific medicine. Most doctors are able to diagnose most illnesses through history taking and physical examination. Only in a few cases, laboratory tests are needed to clarify the diagnosis, such as with convulsions and abdominal pain, and further tests are needed to rule out other illnesses. Some children are difficult to diagnose early, so the early stage of the disease, especially repeated high fever that does not go away, is more testing for doctors and parents, but as long as the child is in good spirits, do not be too nervous, some parents are determined to ask for fluids, worried about not burning into pneumonia, encephalitis or something (need to remind parents, fever is a manifestation of the disease, not the disease caused by fever, pay attention to the cause and effect relationship). At the beginning of the disease, the main thing is to closely observe whether there are other manifestations, and actively treat the symptoms, physical cooling, drinking more water, oral antipyretics if necessary, etc. If the fever does not subside repeatedly, you can also infusion treatment, replenish water, electrolytes, etc., without the application of antibiotics.