Band-aid is not a panacea, and it is not suitable for all wounds. Generally speaking, the band-aid is mainly used for some small and shallow wounds, especially those with neat and clean incision and less bleeding, such as knife wound, cut and glass scratch.
The correct way: before using the band-aid, check the wound for dirt residue. If there are impurities, be sure to clean the wound with sterile saline before sticking the band-aid. If the wound is pierced and deep by nails and other things, you should go to the hospital immediately and need to inject tetanus antitoxin. Secondly, after opening the band-aid, avoid polluting the medicine surface. When smearing, the medicine surface must be aimed at the wound, and the two sides of the wound should be slightly pressurized after smearing. It is necessary to strictly control the indications. Band-AIDS should not be used for large and deep wounds with foreign bodies. In this case, you should go to the hospital in time. Band-AIDS should not be used for contaminated or infected wounds, such as severe skin abrasions and burns. As for folliculitis, furuncle, purulent infected wounds and various skin diseases, it is even more inappropriate to use band-AIDS.