what does marshmallow do
MARSHMALLOW Overview Information. Marshmallow is a plant. The leaves and the root are used to make medicine. Donât confuse marshmallow with the mallow (Malva sylvestris) flower and leaf. Marshmallow leaf and root are used for pain and swelling (inflammation) of the mucous membranes that line the respiratory tract.arshmallow leaf is used topically as a poultice for insect bites. Marshmallow root is applied to the skin as an ingredient in ointments for chapped skin as well as for pain and swelling of the feet and hands due to exposure to the cold (chilblains). In foods, marshmallow leaf and root are used as a flavoring agent.