MLS Laser Therapy for Achilles Tendonitis

Rest and ice quiet Achilles pain. They don't necessarily fix what's actually wrong with the tendon. MLS laser therapy is aimed at the second part — the degeneration underneath the pain, not just the symptom.

What's really happening in a stubborn Achilles

Achilles tendonitis develops from overuse or repetitive strain on the tendon connecting your calf to your heel bone — common in runners and anyone doing repetitive high-impact activity. Stiffness, swelling, and sharp or throbbing pain along the back of the leg are the usual signs. Left untreated, it can become chronic or, in severe cases, progress to a rupture requiring surgery.

Standard first-line treatment — rest, ice, physical therapy, anti-inflammatory medication — helps manage symptoms but often doesn't fully resolve the underlying inflammation, especially once tendonitis has been present for a while. That gap is where laser therapy fits in.

How MLS laser therapy works

MLS (Multiwave Locked System) laser therapy delivers two synchronized wavelengths of light energy into the tissue. Through a mechanism called photobiomodulation, that light energy:

• Reduces inflammation around the tendon directly, rather than only suppressing the pain signal.
• Interrupts pain signaling, providing real relief during and after each session.
• Stimulates cellular repair, increasing the energy available to cells doing the actual work of healing the tendon.
• Improves local blood flow, which chronic tendon injuries often lack enough of to heal well on their own.

What a session is like

Roughly 10–15 minutes, entirely non-invasive: the device is passed over the affected area, most patients feel a mild comfortable warmth, and there's no needle, no incision, and no downtime. You walk out and go about your day.

How many sessions depends on how long the tendonitis has been present. A recent, acute flare-up typically needs fewer sessions than a case that's been dragging on for months, where the tissue has had more time to degenerate rather than simply inflame.

Who this is a good fit for

Laser therapy is worth considering if conservative measures — rest, ice, stretching — haven't fully resolved your Achilles pain, or if you'd rather address the tendon directly than manage symptoms indefinitely. It pairs well with the structured return-to-activity approach in our Achilles recurrence guide and return-to-sport plan — the laser addresses the tissue, the exercises and pacing address why it flared up in the first place.