IFS therapy, interference current therapy, Vracar

IFS therapy

Physical therapy | IFS therapy

IFS therapy is physical therapy with interfering currents. Interference currents represent intermediate frequency currents that arise from two alternating current sinusoids that overlap each other in various combinations. The result of their interference is a low frequency current of 1 to 100Hz. Interference occurs deep in the tissue, so these currents are called endogenous currents.

Interfering currents have an analgesic, anti-inflammatory effect (reduce inflammation), accelerate tissue regeneration (improve tissue oxygen supply), stimulate lymph flow and blood flow and thereby helping the resorption of edema, hematoma and harmful metabolic products.

By accelerating the circulation of ions, they stimulate tissue metabolism and have a favorable effect on muscle tone and trophism. They also promote osteogenesis, i.e. bone healing after a fracture.

Interference currents do not have a thermal effect (they do not heat the tissue), so they are also applied in those cases where there is osteosynthetic material or other metal objects (eg hip endoprosthesis, knee endoprosthesis, postoperative conditions of the spine...).


  • Degenerative rheumatism (cervical and lumbar syndrome, arthrosis of peripheral joints)
  • Neuralgia
  • Inflammatory rheumatism (rheumatoid arthritis, Mb. Bechterew)
  • Extra-articular rheumatism (fibromyalgia, shoulder and hip periarthritis, enthesopathies, tendinitis...)
  • Post-traumatic conditions and sports injuries (joint sprains and dislocations, fractures).


  • malignant diseases
  • heart disease
  • patients with a pacemaker device
  • bleeding tendency
  • patients on anticoagulant therapy.

Duration of treatment

The duration of the interference current treatment is between 15 and 30 minutes, depending on the indication.