All layers of skin are destroyed, reaching fat, muscle, or bone. Skin appears charred, white, or leathery. Pain may be absent due to nerve destruction.
Step-by-Step Guidance
Immediately call EMS. This is a critical medical emergency requiring advanced burn unit care.

Remove the patient from the source of heat, smoke, or electrical current safely.

Cut away loose clothing around the burn, but leave any fabric that is fused to the wound.

Cover the burn area loosely with a sterile, dry, non-fluffy sheet or non-stick dressing.

Lay the patient flat, elevate legs slightly, and watch for signs of airway swelling (hoarse voice, soot in nose).

Surgical grafting required (months)
Timeline is typical for uncomplicated healing. Always follow doctor guidance.