Burns are caused by contact with dry heat.
Scalds result from contact with moist heat.
The effects of burns and scalds are similar. In first-degree burns, the damage is limited to the outer layer of the skin, resulting in redness, warmth, an occasional blister, and tenderness. Mild sunburn is an example of a first-degree burn. In second-degree burns, the injury goes through the outer layer and involves the deeper layers of skin, causing blisters. In third-degree burns, the full thickness of skin is destroyed and a charred layer of seared tissue is exposed.