Open any bathroom cabinet today and you are likely to find a tube of arnica cream or an herbal arnica tincture. In fact, arnica is one of the most widely used herbal remedies, traditionally used to treat bruising and muscle sprains. Proven to increase blood capillary supply when applied topically, arnica has multiple uses with anti-microbial, anti-irritant and anti-rheumatic properties. In cosmetics, arnica oil is a fantastically conditioning ingredient in skin and hair care.