It is not recommended to use iodophor when chickenpox breaks, because iodophor tends to stain through the broken skin. In order to avoid infection from broken chickenpox, patients with chickenpox should trim their nails diligently to avoid raising the chance of infection by scratching the blisters, and should wash their hands diligently to avoid virus residue. Clothes should be changed regularly to ensure clean underwear to avoid infection from broken blisters. Chickenpox may cause bacterial infection due to improper care and when the skin is unclean, and sometimes it may break down due to scratching the blisters, which may also cause bacterial infection easily. It is common to have purulent infections, cellulitis and sepsis in severe cases, and severe infections can lead to gangrenous chickenpox, extensive skin necrosis, and even death due to sepsis, so it is especially important to strengthen care.