Arnica Montana Radix is applied to the skin for insect bites, arthritis, muscle and cartilage pain, chapped lips, and acne. In manufacturing, arnica is used in hair tonics and anti-dandruff preparations. It has been officially approved as a topical treatment for treating sprains, bruises, rheumatic pain in muscles and joints, and other common conditions. Countless homeopathic practitioners and patients alike use it as a go-to remedy for these ailments, and swear by its effectiveness.