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Boil an egg, remove the yolk (yellow part) and have ready sugar, pulverized; fill the place occupied by the yolk and while hot and apply as needed . If too strong, add a little rain water.
Cover the egg with a wet cloth to maintain heat for 10–15 minutes. Apply the compress several times a day. After using the compress, gently massage the infected area.
I know some people that just use the boiled egg only.
Note: Sugar has been used to treat wounds for thousands of years, including during the Napoleonic Wars. Sugar's high osmolarity reduces moisture in the wound, which prevents bacteria from thriving. Sugar also creates a protective layer over the wound and provides energy for cells. Applying sugar to a wound can sometimes cause a burning sensation. This is because the sugar draws moisture out of the wound