Electrotherapy consists of the use of electrical currents within the therapy. Although its development has only improved in recent decades, its use was already used in antiquity. The oldest records date back to 2750 BC, when electric fish were used to shock patients and thus obtain local analgesia.

​

  Electrotherapy devices use a very low current intensity, they are milliamps and microamps. The electrodes are applied directly to the skin and the body will be the conductor. In electrotherapy we have to consider parameters such as: resistance, intensity, voltage, power and conductivity.

​

  Current equipment employs different types of currents, where the device emits electromagnetic energy which is then conducted through conductor cables to the electrodes that are adhered to the patient's skin. Other ways include the use of needles instead of electrodes, this use being more reserved for use for aesthetic therapy or for diagnostic methods.

​

  There are a variety of currents that can be used in electrotherapy, each with its own particularities regarding indications and contraindications. But all of them have a common goal: to produce some effect on the tissue to be treated, which is obtained through the physical, biological and physiological reactions that the tissue develops when undergoing therapy.