Bruises, Bread and Vinegar Quick Remedy for

"Apply a poultice made of hot vinegar and bread. A girl bruised her fingers with some iron rings ina gymnasium. She applied this poultice at night, and they were well in the morning. Since then I always use it for a bruise."

Source: Mother's Remedies: Over One Thousand Tried and Tested Remidies from Mothers of the United States and Canada, T. J. Ritter