Millimeter wave therapy-

The generation of electromagnetic waves of the 1-10 millimeter length level (Gigaherz waves) has been used for decades, primarily in Russia as a treatment for pain.  These waves are in the range 30-70 GHz with a power density of 10 mW/cm2, are non-ionizing, do not produce direct physical damage, nor produce any heating of the tissues.  In the US, it was theorized by Norm Shealy,, a pioneer in pain medicine, that a device for pain treatment patented by Kent in 1919 called Electreat operated in the GHz range, but this remained unproven and untested.  Millimeter wave therapy (MW) is usually placed on acupuncture points rather than directly over the injured tissue.   There are not many studies of MW but there is limited data to support its use in trigeminal neuralgia, joint pain, and headaches.  The machines are also used for weight loss.   Although the alpha level evidence is very sparce, there is an expansive review is located at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1475937/

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