Car fires are common in many accidents resulting in burns categorized up to four different degrees of injury:nFirst-degree burns: The least severe burn, first-degree injuries affect only the outer layer of skin and can be caused by severe rubbing against a surface, usually not involving fire.nnSecond-degree burns: Burns that affect the outermost layer of skin and the dermis, the second layer of skin tissue, often resulting from coming into contact with hot metal. Second-degree burns result in scarred tissue, blisters, swelling, red or white skin blotches, severe pain, and typically require skin grafting with healthy tissue.