Yerba mansa is a warming diaphoretic and immune-activating herb used in traditional North American medicine for colds, flu, infections, and digestive problems. The herb is pleasant-tasting, reminiscent of cinnamon, and makes a good cold and flu-preventative tea in the colder, damper months. It is used for acute and chronic gastroenteritis, for bronchitis and moist coughs, and as a wash for mouth and gum sores and laryngitis. It makes a good nasal spray for hay fever or sinusitis.