The different types of burns are categorized as follows: First-degree burns – under this type of burn, the first layer of the skin is hurt. It is painful, and the skin turns red. However, there are usually no blister formations. Second-degree burns –in this type of burn, the epidermis and the dermis are burned. There is redness, swelling, and blistering with considerable pain. Third-degree burns – the skin's epidermis, dermis, and fat layers are damaged. The sweat glands and hair follicles are also damaged. Since the nerve endings are damaged, pain is usually felt in the areas adjoining the burnt part. Fourth-degree burns – all the layers of the skin, the tendons, and the bone are damaged. Fifth-degree burns – all the skin layers are damaged, and the bone is also exposed as the burn reaches up to the bone. Sixth-degree burns – the skin and bone layers are burned and damaged. These burns are usually fatal.