Arnica - Arnica montana
It is an anti-inflammatory and vulnerary herb used to treat pain, swelling, and bruising associated with traumatic injuries such as fractures, sprains, bruises, and contusions, as well as muscular pain from overexertion. For this purpose it can be used topically on unbroken skin or homeopathically.
Arnica is toxic and must be used with caution and under the close supervision of a qualified herbalist if taken internally. Homeopathically, arnica is very safe and is used to support healing in the case of shock, post traumatic stress disorder (PTSD), post surgical trauma, invasive dental work, and concussion in addition to its aforementioned use for injuries.