I have always found relief from TENS (Transcutaneous Electrical Nerve Stimulation) as well as ultrasound. I started seeing a chiropractor in 2010 who utilized a combo unit which does TENS and Ultrasound simultaneously. This combo gave me much more relief than the two separate therapies. I think the dynamic TENS vs static gives much better relief. I went on a search to find a home unit.

Ultima® UTC 1000 Portable Ultrasound TENS Combo

I purchased from OTCWholesale (OTC's website also has a PDF of the manual). While you can use it on yourself, probably not the best idea for those of us with TOS (my hand & arm tires quickly). My wife has been great about treating me whenever I need it. Nightly use of this did wonders for my rotator cuff bursitis and really helps my scapular & trapezius pain. Unfortunately for me, I can't use ultrasound on my neck because of the hardware from my cervical fusion.

I hope this information is useful.