TENS Therapy: A Practical Guide to Pain Modulation

Not a cure, but a tool — understanding how TENS fits into your rehabilitation

TENS (Transcutaneous Electrical Nerve Stimulation) works through neuromodulation, helping the nervous system temporarily reduce pain signals. It does not heal tissue, but it can be a valuable support tool in your recovery when used correctly.

1. What a TENS Machine Actually Does

TENS works through neuromodulation, helping the nervous system temporarily reduce pain signals. It does not heal tissue.

Mechanisms:

Pain Gate Theory

Fast-acting relief by competing with pain signals

Endogenous Opioid Release

Releases natural pain-relieving chemicals in your body

2. When TENS Can Be Useful

TENS is useful when:

Pain is too high to start rehab
Flare-ups limit movement
Pain interferes with sleep
You need symptom relief while active rehab continues

3. When TENS Should NOT Be Used

Avoid using TENS over:

Open wounds or infected skin
Carotid artery
If you have pacemakers/defibrillators
Pregnancy abdomen
During driving or sleeping

4. How to Use a TENS Machine Properly

Pad Placement:

Place pads around—not directly on—the painful area.

Intensity:

Strong but comfortable tingling; no muscle contraction.

Duration:

15–45 minutes, up to twice daily.

Settings:

High Frequency (80–120 Hz)

Fast, short-term relief

Low Frequency (2–10 Hz)

Slower onset, longer relief

5. Expected Outcomes

Short-term benefits:

Reduced pain sensitivity
Easier movement
Decreased muscle guarding
Improved sleep

Relief may last minutes to hours depending on the person.

6. What TENS Will Not Do

It will NOT:

Heal injury
Rebuild tissue
Resolve biomechanical causes
Replace strength or mobility training
Cure chronic pain

It is a passive tool, not a long-term solution.

7. How TENS Fits Into Rehab

TENS works best as:

A precursor to movement
A calming tool after activity
Support during flare-ups
A facilitator of graded exposure

8. Signs TENS Is Helping

Increased confidence in movement
Less guarding or bracing
Reduced irritability after activity
Improved tolerance for exercise

9. When to Avoid Relying on TENS

You're avoiding movement
Relief is only temporary
Function is not improving

These are signs it's time to refocus on active rehab strategies.

10. Key Takeaways

TENS is a support tool — not a solution.
It works best alongside movement and exercise.
Your goal is to need it less over time.

Need Help Using TENS Effectively?

A physiotherapist can show you how to integrate TENS into a comprehensive rehab plan.

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