Mustard plaster is a type of DRESSING that has been used for centuries as a home remedy for various ailments. It is made from a combination of mustard powder, flour, and water, and is applied directly to the skin. The plaster is believed to draw out toxins and stimulate circulation, helping to reduce inflammation and pain. It is also thought to help with respiratory issues such as bronchitis and asthma. Mustard plaster is still used today as an alternative treatment for a variety of conditions.