Hi Stella Maris and welcome~
If it were me I'd ask my regular doctor about these. I'll admit that I haven't heard of any of them so I went looking.
Bemer & Rife: "pulsed electromagnetic fields (PEMF) interact with the body to trigger beneficial changes." Seems the Bemer device and the Rife machine are tied together.
Perl m+:" We took the Rife machine… and gave it a PEMF twist. The PERL M+ is a non-contact, non-invasive research device that emits a Pulsed ElectroMagnetic Field, commonly referred to as PEMF. It creates an electrostatic charge at the deepest cellular level in the body with the ability to create optimal environment for beneficial change. The particular frequencies carried on the emission from the plasma tube not only target the problem area but help bring the entire body to a level of homeostasis – boosting the immune system, detoxing, repairing tissue, enhancing bone regeneration, strengthening the organs, increasing energy, reducing stress/inflammation and creating an ideal environment inside and outside of the body for optimal wellness."
This one sounds too good to be true IMHO. They say as long as you're within 30' of the machine it will do all of this.
IMRS: It replicates the natural magnetic field of the earth making it one of the most effective and tolerable systems out there.
Hope this may help you with your decision.
Fibromyalgia (chronic pain), IDDM (diabetes). Ulcerative Colitis, , Osteoarthritis, Degenerative Disk Disease, Depression, Chronic Fatigue Syndrome, PTSD and others trying to mess up life.
The microwave oven is the consolation prize in our struggle to understand physics. ~Jason Love