From Arnica mantana, leopard's bane or Fallkraut. The homeopathic remedy is made from the whole fresh plant or just the root, or from the dried flowers, and is traditionally used to minimize the immediate effects of shock, falls, bruising, bleeding, and injuries caused by blunt objects. It also helps traumatized tissues to heal.
Those who derive most benefit from Arnica tend to be rather morose and morbidly imaginative. No matter how ill they feel they are likely to deny that anything is wrong with them and refuse to see a doctor.