According to herbal and folk tradition, arnica oil stimulates the peripheral blood supply when applied externally to the body. It is considered to be one of the best remedies for bruises and sprains. It is believed to relieve rheumatic pain and other painful or inflammatory skin conditions, so long as the skin is not broken. Arnica is never taken internally because of high toxicity levels.

The essential oil of arnica is collected by steam distillation of the flowers or roots.

It is a perennial alpine herb, native to northern and central Europe.

The oil is produced mainly in France, Belgium, and Germany.