Some wounds are very slow to heal. Keeping moisture at the right level in a wound is very important, so wounds are almost always kept covered while they are healing. There are many different dressings that can be used to cover a wound. These dressings have different capabilities in handling the fluid that comes out of a wound. Some dressings can only be worn for a few days, while others may be worn up to 7 days. Dressings with short wear times may require more visits to the doctor's office for changes, while dressings with a longer wear time may mean fewer visits to doctor's office.