Arnica (Arnica montana) has been used for medicinal purposes since the 1500s and is still popular today. Applied to the skin as a cream, ointment, liniment, salve, or tincture, arnica has been used to soothe muscle aches, reduce inflammation, and heal wounds. It is commonly used for injuries, such as sprains and bruises. As an herb, arnica is usually used topically (on the skin) because it can cause serious side effects when taken by mouth.

Arnica is a perennial that grows to a height of 1 to 2 feet with yellow-orange flowers similar to daisies. Stems are round and hairy, ending in 1 to 3 flower stalks, with flowers 2 to 3 inches across. Leaves are bright green. The upper leaves are toothed and slightly hairy, while lower leaves have rounded tips. It is native to the mountains of Europe and Siberia, and is cultivated in North America.