A mix or paste of herbs that are wrapped in a cloth and placed on the skin. The poultice is left on the skin for an extended period of time. The most common uses for a poultice are for skin issues, like sunburns and insect bites.
From: The Master Book of Herbalism by Paul Beyerl
1/2 oz herbs
1/2 cup boiling water
steep 20 mins
Make a thick paste with the desired herb, clay, or charcoal and water.
Apply directly to the affected skin or place between two layers of cloth and apply the cloth to the skin
Leave for 20 mins - 3 hours. Repeat as necessary.