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. The seriousness of a burn depends on the amount of skin burned, the location of the burn, and the depth of the burn. Correct first aid is essential for rapid recovery. If the victim's clothing is on fire, push the victim to the ground and move him or her away from the flames immediately.