Arnica butter is a cosmetic product that is obtained from the extraction of arnica, a medicinal plant known for its anti-inflammatory and analgesic properties. Arnica butter is used in topical skincare to relieve muscle and joint pain, reduce bruising, and promote wound healing. It can also be used in massage products for its soothing effects on the skin. Arnica butter is often mixed with other nourishing ingredients to create natural skincare and wellness products.