Arnica (Arnica montana) wild crafted This is herb is applied externally to prmote healing of sprains, bruises and any type of trauma. I have applied it successfully to ease pain from sciatica as well as carpal tunnel syndrome. *This her should only be applied to unbroken skin, as it has been shown to cause irritation when applied to open wounds. Choose from 1 oz, 2 oz, or 4 oz. bottle.