Band-aids should not be used for too long and generally need to be changed daily for a maximum of 2 days. Band-Aids are mainly used to treat acute small wounds for hemostasis and protection, but patients should be aware that the wound should be disinfected and cleaned before use. The breathability of the band-aid is poor, especially in summer when the temperature is high. Long time without changing may lead to a high degree of hydration of the local cuticle and the phenomenon of impregnation and whitening, while the wound is more likely to become inflamed and infected in a hot and stuffy environment, thus worsening the wound and affecting its recovery. In general, it is recommended to change the band-aid once a day. When changing the band-aid, patients should observe the condition of the wound, and if there are signs of infection such as redness, swelling and pus, they should stop using the band-aid and seek medical treatment for the wound in time. In addition, patients should also note that Band-Aids should not be used for small and deep wounds, wounds with large trauma, contaminated wounds, or infected wounds.