Menthol is an organic substance that has a cooling effect when in contact with the skin or mucous membranes. It is usually extracted from peppermint oil or synthesized and used in various products such as ointments, balms, cosmetics and medicines.
Menthol is widely used to facilitate breathing, relieve itching, cool the skin, and alleviate pain. It can be used to treat symptoms of colds, flu, nasal congestion, bruises, insect bites, and other conditions.