Arnica works by stimulating the activity of white blood cells that perform much of the digestion of congested blood, and by dispersing trapped fluids from bruised tissue, joints and muscle. Arnica has also been shown to improve the health and conductivity of certain nerves. Arnica also contains thymol (an essential oil), flavonoids, inulin, carotenoids and tannins which stimulate blood circulation.
Arnica is a botanical which has been used for centuries, primarily in Europe. There are over 100 drug products made from this plant. The active components in Arnica are sesquiterpene lactones, which are known for their anti-inflammatory and pain reduction properties.