This can cause the outer layers of skin to crack or flake before the under layers have a chance to heal. Putting toothpaste on burns of this type may dry out the blister. Toothpaste can scrub off plaque, protect tooth enamel, and prevent gum disease, but it's not an effective remedy for burns. Second degree burns are those that damage several layers of skin and usually result in blistering. Toothpaste contains abrasives and detergents, which work well for cleaning your teeth, but not so well when in easing the pain of a burn. Toothpaste should be applied to the sunburn area liberally to ease the burning sensation.
Toothpaste can be dangerous to put on burned skin. It even prevents clogging of the burns. Toothpaste is not only beneficial for regular burns; it is also quite good in case of sunburns. It works wonder while calming your pain and burns down. The general consensus seems to be that putting toothpaste on a burn isn't a good idea.
Make sure you only apply toothpaste. One reason for that is that the ingredients in toothpaste aren't exactly soothing. It gives immediate cooling and relief when applied on minor burns that are not open wounds in reality. The Canadian Red Cross reported that using toothpaste on a burn can actually seal in heat, and prevent the burn from cooling or healing, eventually making the burn worse. Toothpaste is good for burns as it is not sterile. If the level of a sunburn is not too high and blisters have not formed in the area, applying toothpaste can be a perfect remedy against burn.