Arnica flowers have been used for reducing the swelling and pain of bruises, sprains, muscle or joint problems, swelling of the veins under the skin (superficial phlebitis), and for insect bites. It has also been used as a mouthwash for swollen gums and mouth ulcers. Some herbal/diet supplement products have been found to contain possibly harmful impurities/additives. Check with your pharmacist for more details regarding the particular brand you use. The FDA has not reviewed this product for safety or effectiveness. Consult your doctor or pharmacist for more details.