What are the risks and side effects of FES?

Author: SCIRE Community Team | Reviewer: Shannon Sproule | Published: 10 October 2017 | Updated: ~

FES is generally well tolerated by people who can use it safely (see above for when FES may be unsafe). Serious medical complications from FES are rare. However, there are risks and side effects that should be discussed with a health provider before using FES.

More common risks and side effects of FES include:

  • Discomfort or pain
  • Skin redness or irritation
  • Nausea, light-headedness, or autonomic dysreflexia

Other less common risks and side effects of FES include:

  • Mild electrical burns near the electrodes
  • Skin breakdown near the electrodes
  • Fainting
  • Worsening of muscle spasms (spasticity)
  • Muscle and joint injuries, such as joint swelling or muscle strains
  • Broken bones
  • Mild electrical shocks (from improper use or faulty equipment)

In some cases, risks and side effects may be caused by improper use of the equipment. It is essential to learn to use the equipment from a health provider and to only use FES according to their direction and with the settings that they recommend.

For some people, side effects of FES may be stronger at first, but as their body gets used to FES with repeated treatments, their physical reactions may reduce over time.