Deep Heat - Back Patches

Desperate for relief from my nerve pain, I tried these as a non-stinky, use during work solution.

It worked okay, provided you don't move too much (it doesn't adhere too well).

I would have liked it to have produced more heat, but I guess the manufacturers want to be sure no one gets scolded by it.

It works by the exothermic reaction of iron oxidation:  

4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)

Which is why it starts to heat up when exposed to air.
If you are looking for non-stinky pain relief which you can use 

without fear of drug interacts, these are pretty good (if a little 

pricey).

Price: 2/5 (RRP $13.33 for 2 patches)Scent: 2.5/5 (None)Effectiveness: 4/5