When you discover a bump on the upper lip, start applying ice over it as soon as possible. However, the ice should not come in direct contact with the skin. Take a plastic bag, fill it up with ice cubes, wrap up the bag with a towel and then place it on the lips for 10 minutes. After that, take a break for 15 minutes and apply it all over again. A bag of frozen peas can also be used for the same purpose.