Pressure ulcers have degrees of severity.
The most severe ulcers are grade 4 and usually have exposure of bone or muscle in the ulcer. The body cannot fill in the defect. These severe ulcers usually require surgical closure. A plastic surgeon usually moves some muscle along with skin to the opening and stitches it in place to close the ulcer. Grade 1, 2 & 3 ulcers will close with bandaging.