Arnica Infused OilArnica montana - U.K.Infused in Sweet Almond Oil in the ratio herb:oil 1:5 Arnica oil is especially useful for the treatment of bruising, sprains and other musculoskeletal injuries. If used directly after a strenous workout, arnica oil can help reduce swelling, muscle stiffness and pain. Caution: Do not apply arnica oil directly to broken skin.Click on Aromatherapy Carrier Oils for more information on our carrier oils.