What is TENS?
TENS (Transcutaneous Electrical Nerve Stimulation) is a simple and safe treatment that uses mild electrical impulses to reduce pain.
Small adhesive electrodes are applied to the skin and connected to a portable device that sends low-voltage impulses.
How Does it Work?
TENS stimulates the skin nerves and interferes with pain signals traveling to the brain.
According to the most recent studies, its effect may be due to:
- Modulation of nerve activity
- Release of endogenous opioids (such as the body’s natural endorphins)
- Inhibition of pain transmission at the spinal cord level
The effect is temporary, but can provide relief in daily activities.
What is it Used for?
TENS can be useful for:
- Back pain, neck pain
- Joint pain (e.g., arthritis)
- Muscle or tendon pain
- Nerve pain (sciatica, neuropathies)
- Post-operative pain
- Menstrual or chronic pain
It can be used alone or together with other treatments.
Is it Effective?
A review of over 380 clinical studies (Johnson et al., 2022) demonstrated that:
- TENS can reduce pain immediately
- It is effective for both acute and chronic pain
- It works regardless of diagnosis
Not all patients respond in the same way: in some cases relief is evident, in others less so.
Is it Safe?
Yes. TENS is considered very safe.
No serious side effects have been observed in clinical studies.
Possible mild effects:
- Redness or tingling in the electrode area
- Sensation of pins and needles or temporary discomfort
How is it Used?
- The electrodes are positioned on the skin, in the painful area
- The intensity is adjusted until you feel a stimulation that is strong but not painful
- Each session lasts approximately 20–30 minutes
- It can be used multiple times per day, according to medical advice
It is important to find the correct electrode placement to achieve the best effect.
When NOT to Use TENS?
Avoid TENS if:
- You have a pacemaker or other implanted electrical devices
- You have open wounds, infections, or damaged skin in the area
- You have altered sensation
Pregnancy: TENS is not absolutely contraindicated, but is recommended only if prescribed by a doctor and not in the abdominal or lumbar area.
Do not use TENS:
- While driving
- While sleeping
- In the shower or in water
What Does Research Say?
According to a systematic review published in 2022 (Johnson et al., BMJ Open):
- TENS reduces pain during and immediately after application
- It is safe and well tolerated
- It is not proven to directly improve quality of life, but can better support daily pain management
Another 2023 review (Szmit et al.) also suggests that:
- TENS can reduce the use of pain medications
- It is also usable in elderly patients
- It can improve pain tolerance
Main Advantages
- Does not require medications
- Can be used at home
- It is safe and well tolerated
- Also useful in combination with other treatments
- Easy to use