Arnica Heterotheca Inuloides: Native to the mountains, arnica flowers have been used in European folk medicine for centuries. The active compounds in arnica have anti-inflammatory, pain-relieving, and antiseptic properties. Arnica is well known for relieving rheumatism, sore muscles, sprains, and arthritis. It is used to diminish bruising by improving the local blood supply to target areas, thereby speeding circulation and healing.