Chickenpox starts after the rash, about 5-7 days to finish, but to the scab, scab removal, need to recover at least 10 days or so. Chickenpox is an acute respiratory infectious disease caused by the initial infection of varicella-zoster virus. The incubation period of chickenpox is relatively long and can be up to 14 days, once the disease develops it is firstly a flu-like symptom, with fever, headache, sore throat, and the rash may appear 48 hours after the fever. The rash begins with a macular rash, papules, and blisters, and gradually crusts over. If there are no obvious skin infections or other comorbidities, the rash can clear up in about 10 days. It should be noted that there may be obvious itchy skin symptoms during the process of the rash, you can apply glycerine lotion or Chinese medicinal preparations to relieve the itch appropriately, but remember not to scratch with your fingernails randomly to avoid scarring.