Answer:Arnica applied topically as a gel, ointment, cream, or spray has only shown modest benefit in minimizing bruising, swelling, and pain in some clinical trials and some trials have shown no benefit. Any potential benefits may depend on the concentration of arnica in the product. Be aware that allergic reactions can occur and that there are two very different types of topical arnica: Herbal arnica and homeopathic arnica, and each of these come in very different concentrations. Learn more in the full answer >>
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