Whether a burn can be cured depends mainly on the severity of the burn; first-degree burns and superficial second-degree burns are generally curable, deep second-degree burns can leave scarring, and third-degree burns may leave scarring and deformities. Burns are a condition caused by heat damage to the skin or mucous membrane tissue, which not only damages localized tissues, but can even cause a systemic reaction. Whether a burn can be cured is mainly related to the severity of the burn. Burns can be categorized into I degree, superficial II degree, deep II degree and III degree. I-degree burns usually heal in seven days without scarring; superficial II-degree burns also heal without infection and may have hyperpigmentation; deep II-degree burns usually take three to four weeks to heal and may have scarring; and III-degree burns require skin grafts to heal and may have scarring and deformities. Severe burns must be treated as an emergency, especially those who are in shock need first aid, otherwise they are likely to face the consequences of death.