A mustard poultice is a traditional remedy that involves spreading a paste made from powdered mustard seeds mixed with a liquid, often water, onto a piece of cloth. This cloth is then applied to the skin. The heat and pungency of the mustard are believed to help increase blood flow to the area, providing relief from muscle pain, stiffness, and congestion. The poultice is typically left on the skin for a limited time to avoid irritation or burns. It is important to monitor the skin's reaction and remove the poultice if any discomfort occurs. Mustard poultices have been used for centuries in folk medicine and are valued for their warming and stimulating properties.