Marshmallow root is an ingredient in many lung preparations and cough syrups, as well as preparations for urinary tract problems, stomach ailments, and wound healing.
Native Americans used this herb externally for burns, swelling of the lymph nodes, and insect bites. Internally, it was used for pain associated with headaches and stomachaches, measles, coughs, and gonorrhea. It was also used for rattlesnake bites. Today, the herb is used for prophylaxis and treatment of flu, sepsis, and mild to moderate cold infections.