Interferential Current Therapy
A non-invasive electrotherapy treatment designed to help relieve pain, reduce inflammation, relax muscle spasms, and support recovery.
What Is Interferential Electrotherapy?
Interferential Current Therapy (IFC) is a non-invasive, pain-relieving treatment that uses medium-frequency electrical currents to stimulate deep tissues beneath the skin.
It is commonly used in chiropractic and physical therapy settings to manage acute and chronic pain, reduce inflammation, relax muscle spasms, and support the healing process.
Unlike other forms of electrotherapy, IFC penetrates deeper into the body’s tissues with minimal discomfort, making it helpful for conditions involving the joints, nerves, and muscles.
See IFC in Action
Want to see how Interferential Current Therapy works in real time?
Watch the short video to see it in action during an actual treatment session.
How Does IFC Work?
IFC uses two medium-frequency electrical currents that intersect at the site of pain.
Where the two currents meet, they create a low-frequency therapeutic effect deep in the tissues, without causing the skin irritation often associated with low-frequency stimulation.
Therapeutic effects of IFC include:
- Pain relief by stimulating the body’s natural endorphin release
- Reduction in swelling and inflammation
- Increased local circulation, promoting healing of injured tissues
- Relaxation of muscle spasms or guarding
- Improved range of motion when used alongside stretching or manual therapy
Treatments are typically pain-free and last 5–15 minutes. Electrodes are placed on the skin surrounding the painful or injured area, and the intensity is adjusted for comfort and effectiveness.
IFC vs TENS: What’s the Difference?
While IFC and TENS are both forms of electrical stimulation used for pain management, there are important differences.
| Feature | IFC | TENS |
|---|---|---|
| Frequency | Medium-frequency currents that intersect to produce therapeutic low-frequency effects | Low-frequency stimulation applied directly to the skin |
| Penetration Depth | Deeper tissue penetration | Surface-level stimulation |
| Comfort Level | Often more comfortable with less skin irritation | May cause tingling or skin fatigue |
| Effectiveness | Often used for deep muscle or joint pain, swelling, and nerve root irritation | Often used for mild to moderate surface-level pain |
| Clinical Use | Used in clinical settings by practitioners | Often used in home units |
Choose IFC When
You have deeper musculoskeletal issues, nerve root irritation such as sciatica, or joint inflammation that isn’t responding well to surface-level therapies.
Choose TENS When
You are managing ongoing mild pain at home and want a portable device for use between treatments.
At Lakeside Chiropractic, we use IFC in-clinic for enhanced results during recovery and can guide you on whether TENS at home might also be appropriate.
Relevant Research & Evidence
- A study in Korea found that IFC was more effective than placebo in reducing musculoskeletal pain and improving functional outcomes, especially when combined with other therapies.
- A randomized clinical trial found that IFC was more effective than TENS in reducing pain intensity in patients with chronic low back pain, particularly when used with manual therapy and exercise.
- A comparative study found that IFC produced greater increases in blood flow and deeper muscle stimulation compared to TENS, supporting its use in cases requiring deep tissue effects.
Frequently Asked Questions
Learn more about what IFC feels like, when it may be used, and whether it is suitable for your needs.
