Also - what I do to relieve foot pain, inflamation, and tendonitis:
Tiger Balm: This contains 5% oil of cloves, an anesthetic used for tooth ache. It is surprisingly effective in relieving foot pain, and some ballet dancers use it. (Note: Tiger Balm intructions are do not use physical heat with Tiger Balm).
Deep Heat: The sports doctor I go to treats athletes from the Australian Institute of Sport - he really know his stuff. He recommends anything with Methyl Salicylate (i.e. Deep Heat) is the most cost-effective pain relief, and told me a lot of other more expensive creams are not necessary (at least for my situation - and I have severe arthritis in my big toe joint from a sports injury).
Voltaren (gel - not tablets) to reduce inflammation.
Eucalyptus based creams and oils - 'Bosisto's Eucalyplus Rub' and 'Elmore Oil'.
I have found that the process of thoroughly massaging the creams and oils in for a decent period of time every day helps cure tendonitis and myofacial tissue problems. I believe the massaging itself is very helpful.
I sometimes also apply physical heat, and I use a full sized hot water bottle so it stays hot for a long time.
I don't have a medical background - I'm a computer geek - so the above is not medical advice, but it works for me.