It is a stimulation through the skin, which consists of the application of an electrical current provided by an external, portable and small electrical device or device, which emits high frequency and low intensity pulses through skin electrodes, or vice versa, depending on the type of pain, to the selected painful surface or to the nerves. These small electrical impulses "deceive" the transmission of pain.
This type of stimulation is practically free of adverse effects.
TENS (Transcutaneous electrical nerve stimulation) stimulation is perceived by the patient as a more pleasant sensation than the pain he suffers.
The so-called "Neuromuscular Electrical Stimulation" (NMES) refers to the use of equipment that generate electrical current for motor stimulation, i.e., generate muscle contraction.
When the ultrasound penetrates the body, the effect of the vibrations mobilizes the internal particles and stimulates the reabsorption of the inflammatory fluid.
Ultrasound also allows the transmission of energy to tissues producing heat. Another effect is the increased permeability of the cell membrane, which allows the entry of nutrients and the elimination of cellular waste.