@carsonann, I did a search of Connect and didn't find any other members who have mentioned Hivamat deep oscillation therapy. I did find a research article that mentions the use of the device but not sure how helpful it is.

"Recently, effective portable devices have become available that can be used in the early stages
of rehabilitation in outpatient settings [1-10].
The Hivamat 200 is widely used in physiotherapy. In this procedure, the patient's tissues are
electrostatically attracted and repelled in a rhythm of a given frequency. The essence of the
technique is that electrostatic impulses, which create small oscillations and deeply penetrate into the
tissues, gently affect the skin, subcutaneous fatty tissue, connective tissue, lymphatic and venous
vessels. Such oscillations have a directed anti-inflammatory, trophostimulating, detoxifying and
draining effect, as a result of which local metabolic and trophic processes in the skin layers are
improved and accelerated; pain, inflammation and oedema are significantly reduced. New
physiotherapeutic technologies really need a better justification of their early application, as well as
methods of evaluating the effectiveness of such rehabilitation treatment. Randomised comparative
studies on the use of Hivamat 200 in the early recovery period after pelvic surgery and in diabetic
neuropathy of the lower limbs."
-- QUALITY OF LIFE OF PATIENTS RECEIVING VARIABLE ELECTROSTATIC THERAPY WITH HIVAMAT 200 DEVICE: https://www.physiopod.co.uk/assets/pdfs/kachestvo-zhizni-patsientov-poluchavshih-peremennuyu-elektrostaticheskuyu-terapiyu-na-apparate-hivamat-200%20en.pdf

Another discussion you might want to look at is the Myofascial Release Therapy (MFR) for treating compression and pain: https://connect.mayoclinic.org/discussion/myofascial-release-therapy-mfr-for-treating-compression-and-pain/. Quite a few members have found MFR provides relief from their symptoms.