My daughter was born with a skin condition known as seborrhea.
Use alum and egg white to kill fungal infections.
Mix 1 tbsp alum with 1 egg white in a small pot. Stir constantly of over low heat until it is the consistency of tapioca pudding. Apply while still warm (not hot) to skin and cover with sock, glove, or bandage, wash off in the morning. One application is usually enough.