I've been using the testers you gave me. Not on my leg for lymph since during radiation these last few months I was told no working on lymph at all. But I've had a brutally painful plantar fasciitis in my left heel for three weeks, so bad I can't walk at times. I have tried different things – reflexology, reiki, massage, Arnica, foot roller, ice. I started rubbing your tester on heel and it stops the pain amazingly well, tingling at first, then deadening the pain for 4-5 hours.