Healthmate Forever HealthmateForever combined TENS & PMS units are nerve stimulators for pain relief and muscle stimulators for muscle conditioning that use self-adhesive electrode pads to target specific nerve and muscle areas. Our electrode pads do not require gel or creams to be applied to the skin and may be used up to 100 times with proper maintenance. We offer a wide variety of high quality replacement electrode pads in varying sizes, shapes, and colors to allow for effective pain treatment and muscle conditioning.