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Followed by a smear of Vaseline.
The idea is to cut off the air.
The cold water takes away the heat and reduces the air contact.
The Vaseline has wonderful healing properties and continues to keep the air away.
Aloe Vera's good too
I am not sure that putting grease on a burn is a good idea!
Vaseline isn't good as its so messy to clean up . Clingfilm is much better and doesn't need to be scraped off. It stops the air and is a sterile dressing