Burns are a very common injury. The least serious, called first degree burns, involve only the out...
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Burns are a very common injury. The least serious, called first degree burns, involve only the outer layers of skin or epidermis, which usually turns red. Second degree burns penetrate both the epidermis and the next layer, called the dermis. Blisters form when watery liquid leaks from damaged tissues and blood vessels. The affected area is painful and has blistery, red marks that can swell or ooze. Third degree burns are the most severe. They penetrate through all layers of the skin and can involve fat, muscle, or even bone. These burns are an emergency and require medical help.