Sheets of paper (usually standard 10 x 11 cm), covered with a layer of black powder or defatted seed Sarepta mustard, used as a means of reflexology. Mustard plaster applied to the skin, irritating it, they cause blood, stimulate circulation and phagocytosis reaction, reflex effect on the inflammation in the deep-lying tissues and organs, the state of the vascular tone, provide distraction and analgesic effect.Mustard is used for pain in muscles, neuralgia, headache, sometimes with hypertensive crises and angina, pneumonia, bronchitis, laryngotracheitis.Shake before using in horizontal position, uniformly moistened with warm water and apply to the skin.