Skip to main content

Low-Level Cold Lasers

How Cold Lasers and Low-Level Lasers Work to Relieve Pain

LLLT, also called cold laser therapy or photobiomodulation therapy, is a type of phototherapy designed to repair tissue, reduce pain and inflammation, target fat and provide other benefits for patients in both medical and veterinary treatments. The capabilities of low-level lasers have been used in fat loss and pain relief for over 50 years.

Erchonia’s commitment to scientific and clinical research in the advancement of LLLT has made the company a recognized world leader in LLLT technology.

Throughout the years, cold or low-level laser therapy (LLLT) has become a hot topic in the medical community. As more research on cold laser technology is conducted, organizations and agencies across the world are beginning to recognize the many benefits that cold laser therapy can offer patients.

How Does LLLT Work?

During a treatment regimen, a small low-level laser therapy device emitting laser beam or visible nonthermal lasers is placed over the target area. The low levels of light penetrate the tissue without heating or damaging the skin.

Unlike traditional lasers, which use around 300 watts, cold lasers use between five and 500 milliwatts. True to their name, they don’t burn the skin or produce pain, and the FDA gives them NHN (non-heating instruments) classification. In contrast, a laser used for surgeries cuts through the skin and can lead to severe scarring and pain.

How Low-Level Lasers can be Used for Pain Relief

No Recovery, No Side Effects

There is no recovery time and no side effects, which makes LLLT an attractive treatment option for a variety of conditions, including:

  • Low Back Pain
  • Neck and Shoulder pain
  • Onychomycosis
  • Plantar Fasciitis
  • Post-Operation Wound Healing


Cold lasers can stimulate all types of cells, including muscle, ligaments, nerves and cartilage.

Cellular Boost

This stimulation of light energy works similar to photosynthesis in plants, as it is absorbed and interacts with light-sensitive components in the body’s cells.

Natural Healing

The treatment promotes the body’s natural healing — which may have been impeded through the tissue damage — by stimulating mitochondria and encouraging the cells to produce more ATP.


As a non-invasive, low-intensity therapy procedure, LLLT can be performed at an outpatient clinic, providing a distinct advantage over traditional laser surgery.

Proven Relief for Various Conditions

Over 2,500 studies since 1967 confirm LLLT’s safety and effectiveness for symptom relief. It’s a preferred non-invasive method for many conditions.

Erchonia laser products, with 17 FDA clearances, safely aid pain management and fat loss. The FX-635 laser achieved a 72% success rate in clinical trials. Discover how our safe and innovative lasers can benefit your patients. Contact us to learn more.

Explore Our Products

Discover the Power of Laser Technology! Click here to unlock a world of possibilities with our extensive range of products, including Foot Fungus Lasers, Fat Loss Lasers, Pain Relief Lasers, Radiation Reducer, Therapeutic Stands & Accessories, Veterinary solutions, and more.

More in Blog

View All
Foot treatment at podiatrist


How to Integrate LLLT in Podiatry Practices

Happy dog at vet


What is Veterinary Laser Therapy?

Power vs Energy


Power vs. Energy