Why My Old Friend Tiger Balm Works

Technology Review - By Jennifer Chu

"Creams like BenGay can relieve minor aches and pains. But exactly why they work is a mystery. Now researchers have discovered a neurological mechanism behind such cooling remedies that, if tapped just right, could have implications for people with chronic and nerve-related pain.
A study published yesterday in the journal Current Biology reveals that activating a crucial protein in the skin may counteract the nerve signals associated with chronic pain brought on by nerve injury. One trigger for this protein receptor is menthol, an active ingredient in topical analgesics like BenGay. But an even more effective trigger is icilin -- a chemical originally designed for toothpaste and nasal sprays. The researchers found that when applied to the skin, icilin stimulates the body's natural cooling system, and helps block chronic, nerve-related pain."