Chickenpox has a rapid onset and initial symptoms include fever, headache, malaise, sore throat, cough, nausea, loss of appetite and other nonspecific symptoms, and this period usually does not exceed 24 hours. A rash has not yet appeared during this period. The hallmark feature of chickenpox is the three-day pattern of rash-blister-crust. “The whole family of chickenpox is seen towards the heart scalp”. Chickenpox rash appears 1 day after fever and is characterized by fever and the appearance of circumscribed red papules, blisters and scabs in batches on the skin and mucous membranes, with a centripetal distribution of the rash, occurring mainly on the chest, abdomen and back, and rarely on the extremities. In other words, chickenpox can appear as multiple lesions at the same time (including macules, papules, herpes, and scabs), so it is also called “four generations together” or “the whole family”. The chickenpox rash is distributed centripetally, with more on the chest, abdomen and back and less on the extremities. In addition, chickenpox can first appear on the scalp and trunk under pressure, while many other infectious rashes do not appear on the scalp, which is also one of the characteristic features. When the rash first appears, it varies in size, 3-5 mm in diameter, surrounded by a red halo, and feels very shallow when touched by hand, and gradually becomes herpetic, resembling a dewdrop. The walls of the blisters are brittle and easy to break, and after a few days the herpes becomes dry, the center is first depressed, umbilical concave, and then crusted, leaving 1-2 weeks for the crust to fall off, leaving no scar, and the child feels itchy during the herpes period. When the herpes scab falls off, the chicken pox is cured.