A pressure sore is an ulcerated area of skin caused by irritation and continuous pressure on part of your body. It starts as an area of skin damage. The damage can then spread to your tissues underlying your skin. In very severe cases, there can be permanent damage to muscle and bone underneath your skin. This is not common though. Pressure sores can be very painful and can take a very long time to heal.
This is a companion discussion topic for the original article at https://patient.info/skin-conditions/pressure-sores