Band-Aids should not be used for too long, but should be changed daily for up to two days. Band-Aids are mainly used to treat acute small wounds for hemostasis and protection, but care should be taken to disinfect and clean the wound before use. The air permeability of band-aids is poor, especially in summer when the temperature is high. Long time without changing may lead to high hydration of the local cuticle and the phenomenon of impregnation and whitening, which makes the wound more prone to inflammation and infection in a hot and stuffy environment, thus worsening the wound and affecting the recovery of the wound. Observe the wound when replacing, if there is redness, swelling, pus and other signs of infection, you should stop using band-aids and promptly seek medical treatment for the wound. It should be noted that Band-Aids should not be used for small and deep wounds, wounds with large trauma, contaminated wounds and infected wounds.