Arnica is a low-growing perennial with daisy-like flowers with a yellow center and lighter color petals. The flowers are separated from the receptacles and the bract so that Arnica herb consists of the florets. Bristly white hairs attached to the ovary give the herb a somewhat fuzzy appearance.
To make an herbal compress, pour 1/4 cup boiling water over 2 teaspoons of Arnica and steep for 10 to 15 minutes, then strain.
Arnica is a component of salves, ointments and other preparations to unbroken skin. Tinctures are another common preparation.