When a doctor removes dead or unhealthy tissue from a wound, it's called debridement. Doctors do this to help a wound heal.
It's a good idea to remove dead tissue for a few reasons. First, dead tissue gives bacteria a place to grow. This can cause infection. Second, dead tissue can slow the growth of healthy tissue.
Your doctor will clean the wound. There are a few ways to remove the dead tissue, such as cutting it out or using an ointment.
If your wound is large, you may need a skin graft. This helps new tissue grow.
How long it takes your wound to heal depends on how serious it is. It also depends on whether you have other health problems that may slow healing. In some cases, people need to have a wound debrided again.