1.If there is itching and burning sensation when applying the patch, the time of applying the patch can be reduced. 2.If local redness and itching occur after dressing, do not scratch to avoid infection. Wait for a few days (1~2 days) after the local symptoms disappear before the next dressing. 3.If there is a large red spot or blister after the dressing, the skin allergic reaction is too strong, please go to the hospital for consultation. 4.It is not suitable for pregnant women and children under 6 months old if the skin allergic reaction is too strong. 5.Poultice used for dressing should be stored below 25℃. 6.This treatment is generally carried out for three courses (three summers).