Stage I-IV pressure ulcers

Pressure ulcers, or bedsore stages I-IV, are injuries caused by prolonged pressure on skin and tissues. Stage I shows redness that doesn't fade, indicating initial damage. Stage II involves partial skin loss, with a shallow open sore or blister. Stage III extends deeper, affecting all skin layers and possibly fat tissue, creating a crater-like sore. Stage IV is the most severe, exposing muscle, bone, or supporting structures with extensive tissue damage. Early stages can heal with proper care, while advanced stages require complex treatment to prevent complications.