Band-Aids are generally not breathable. Band-Aids can be used to adsorb exudate, assist in stopping bleeding, and to a certain extent, prevent the wound from coming into contact with water, reducing the incidence of infection. However, most Band-Aids have relatively poor breathability and are not recommended for long-term use, and should be replaced with a new Band-Aid periodically during use. If the band-aid is used for too long, due to the membrane cloth is not breathable, it may lead to the wound and the surrounding skin whitening and softening, and even lead to secondary infection of the wound, such as redness, swelling, oozing and so on. If conditions permit, use non-sterile gauze to cover the wound, which is more breathable and conducive to wound healing. If there is any discomfort in the wound, consult a doctor for further treatment under the guidance of the doctor.