Please do not be fooled by the following product or those who are selling the product. The jury is still out. Most of the data supporting the product is anectdotal. It seems to be placebo at best.
Sinecch - Homeopathic arnica
http://www.alpinepharm.com/
http://www.jrsm.org/cgi/content/abstract/96/2/60
http://www.herbmed.org/Herbs/Herb92.htm#Category1Herb92