Heat rub

Heat rub is the name for a variety of products intended to relieve the pain of fibrositis, lumbago and muscular aches and strains. They are so named because they produce a feeling of warmth within the muscle of the area they are applied to.

Heat rubs are typically applied in cream form, but patches, sticks and sprays are also available.

Excess application may result in an intense unpleasant burning sensation accompanied by numbness especially when applied to sensitive areas like the eyes or groin.

Well-known brands include IcyHot in the United States, Deep Heat in Ireland, the United Kingdom, Australia and other areas, and Tiger Balm in Asia and Canada.

Active ingredients are typically Menthol and Methyl Salicylate but could also include more exotic ingredients like cayenne.

The methyl salicylate that is the active analgesic ingredient in some heat-rub products can be toxic if they are used in excess.