Arnica oil is found to have antimicrobial andanti-inflammatory properties, and may be helpful for treating or relieving: Muscle aches, spasms, pulled muscles, or rheumatic pain A 2007 study foundthat a homeopathic arnica solution has a positive effect on muscle sorenessafter marathon running. Arnica is actually one of my recommended naturalremedies for delayed onset muscle soreness or DOMS. Sprains, bruises, andswelling due to fractures Insect bites Homeopathic arnica can help treatinsect bites and stings, especially those that may lead to intense bruising andsoreness. Acne It helps to remove acne however, it is not recommend toapply on broken skin. Hair loss a diluted form applied to your scalp canhelp increase local blood circulation, thereby promoting hair growth. There arealso clinical trials suggesting that using arnica oil or gel topically may beeffective in relieving osteoarthritis pain. Arnica oil is used in perfumes andsome cosmetic products, such as anti-dandruff lotions and hair tonics. Asidefrom arnica oil, arnica pellets, topical gels, and creams are also availabletoday. Pure arnica essential oil is NOT recommended for aromatherapy, as it isvery potent and may be toxic. However, its diluted form can help reduce swelling,protect against infections, and relieve pain. Many professional athletes todayeven use a topical homeopathic preparation of arnica oil as first aid relieffor sports- or exercise-related pain or injury.