Some athletes say that arnica helps reduce the pain and accelerate the healing of sports injuries, such as bruises, strains, and sprains.
Arnica is very useful in the early stages of an injury when there is swelling.
Arnica can be used prior to and immediately after a demanding athletic event (e.g., a marathon) to prevent post-workout soreness. While “weekend warriors” may benefit from arnica, they should not use it routinely in lieu of adequate training and stretching; overuse or arnica can cause it to lose its effectiveness or cause side effects such as pain and soreness.
Do not use arnica for more than seven consecutive days. You should discontinue use once your symptoms have improved.
Arnica-containing ointments are recommended by many practitioners for the treatment of sprains and strains and other traumatic injuries.1 Homeopathic arnica tablets are also used by some practitioners for similar conditions.2 One uncontrolled trial showed that arnica gel applied twice daily reduced symptoms of osteoarthritis of the knee and a double-blind study reported that a combination of topical arnica ointment and oral homeopathic arnica tablets reduced pain in people recovering from hand surgery.3, 4 No other studies of topical arnica have been done, but several studies of homeopathic arnica have found it ineffective for treating muscle and joint pain.5, 6, 7
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The information presented here is for informational purposes only and was created by a team of US–registered dietitians and food experts. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements, making dietary changes, or before making any changes in prescribed medications. Information expires December 2025.