Suspected Deep Tissue Injury Blister or discolored skin, boggy. Purple or maroon localized area of discolored intact skin or blood-filled blister due to damage or underlying soft tissue from pressure and/or sheer. The area may be preceded by tissue that is painful, firm, mushy, darker or cooler as compared to adjacent tissue.
Deep tissue injury may be difficult to detect in individuals with dark skin tones. Evolution may include a thin blister over a dark wound bed. The wound may further evolve and become covered by thin eschar. Evolution may be rapid, exposing additional layers of tissue even with optimal treatment.