If you are using regular plasters, they need to be changed when they are visibly soiled with blister fluids, dirt or water from the environment (eg: showering, rain, etc). Depending on many factors, you may need to change your plaster anywhere between every hour to once a day. On the other hand, hydrocolloid blister plasters, such as those of the COMPEED® Blister range, do not usually need to be changed.
For de-roofed blisters, specialist blister plasters like COMPEED® only need to be changed when it starts to peel off, or when the white bubble, formed by the blister fluids underneath the dressing, reaches the edge of your plaster. It is perfectly fine to leave a hydrocolloid plaster on for several days. For intact (unbroken skin) blisters, COMPEED® stays in place until the plaster edges start to lift. They can stay in place for several days. Do not be tempted to remove them earlier to allow the blister time to heal as you risk damaging the healing skin.