There are four stages of a pressure ulcer. Each stage has its own symptoms and characteristics. These stages are as follow:
Stage 1: This stage is characterized by rise skin temperature, color and sensation in skin and consistency of tissue.
Stage 2: This stage is accompanied by a partial loss in the skin thickness. The ulcer becomes superficial. This stage involves dermis, epidermis and sometimes both. Clinically, this stage is presented as a blister.
Stage 3: This stage is characterized by complete loss in skin thickness. Necrosis of subcutaneous tissue becomes damaged and this damage may extend deeper but does not reach the underlying fascia. Clinically, this stage is presented as a deep crater.
Stage 4: Extensive destruction occurs. The damage may reach the bones or the supporting structures. Sometimes, sinus tracks may be present.
