Stage 1 Pressure Ulcers
Stage 1 pressure ulcers are the earliest and least severe form of pressure ulcers. A stage 1 pressure ulcer is characterized by a partial thickness skin loss involving the epidermis or dermis. It may appear as an abrasion, blister, or a shallow crater. The area will be painful, firm, and may appear reddened. It usually doesn't cause tissue loss, but there may be some discoloration.
Stage 2 Pressure Ulcers
Stage 2 pressure ulcers involve partial thickness skin loss with the destruction of underlying tissue. It can appear as an abrasion, blister, or shallow crater. The area may be painful, firm, and discolored. It may also have some drainage and may be accompanied by swelling.
Stage 3 Pressure Ulcers
Stage 3 pressure ulcers involve full thickness skin and tissue loss. It can appear as an abrasion, blister, or deep crater. The area is usually painful, firm, and discolored. It may also have some drainage and may be accompanied by swelling.
Stage 4 Pressure Ulcers
Stage 4 pressure ulcers involve full thickness skin and tissue loss. It can appear as an abrasion, blister, or deep crater. The area is usually painful, firm, and discolored. It may also have some drainage and may be accompanied by swelling. There may also be necrosis of the underlying tissue and bone.