Arnica (arnica montana) is a perennial herb. Arnica's flowers and roots are most commonly used in herbal remedies and medicines, typically applied directly ones skin.
Arnica helps muscular soreness and pain due to strain, overexertion, or sudden jars and blows. Good for any unbroken surface to stop pain; for bruises; sprains; fractures and rheumatism.
Urban Therapeutics new line of Natural Therapy Oils includes a wonderful blend, "Pro Natural Therapy Oil" that has the additions of Arinca & St John's Wort, to create an additional benefit to your client during therapeutic treatments.