Place this over the area to be treated and cover with a larger piece of household plastic. Now use a cloth or towel to cover and hold the sandwich and plastic in place. Secure by a tie, stretch bandage or a pin. This can be messy. Apply poultice immediately for 1-2 hours or at bedtime, leaving overnight.
Adsorption takes place almost immediately.
Change poultice after each use. Wash or gently cleanse area when finished with cool water. Repeat as needed. Life's best things cannot be bought or sold.