In addition to diet, treat bronchitis with a hot poultice. A simple hot poultice of linseed should be applied over the front and back of the chest. It will greatly relieve pain. Poultices act by diluting the vessels of the surface and thereby reducing the blood pressure. The heat of the poultice acts as a cardiac stimulant. A poultice should be applied neatly and carefully and should be often renewed, so that it does not hamper respiration. Turpentine may be rubbed over the chest with fomentation for the same object.