Red light therapy
Supported by researchWhy it might help
Low-level laser therapy (photobiomodulation) delivers specific wavelengths of light to the tissue and is thought to modulate local inflammation and support tissue repair, which studies associate with reduced heel pain.
What the research shows
A meta-analysis of randomized trials and additional RCTs suggest low-level laser (photobiomodulation) therapy may be associated with meaningful reductions in heel pain when added to usual care such as stretching and orthotics. Evidence for improved function is less consistent, and it is best used as an adjunct rather than a stand-alone treatment.
Sources & what they found (2)
Clinical efficacy of low-level laser therapy in plantar fasciitis: a systematic review and meta-analysis — PubMed, 2019
Meta-analysis of 6 RCTs; significant VAS pain reduction sustained to 3 months, no significant change on FFI-pain subscale
RCT; greater pain and function improvement with PBMT plus usual care, sustained at follow-up
Graded claim from the Praxium evidence graph
Plantar fasciitis is well-studied (6+ RCTs, ~20 human studies). Cinar 2017 (sham-controlled, 850 nm) improved function over usual care, Kiritsi 2010 (double-blind, 904 nm) reduced pain and fascia thickness, and Ulusoy 2017 reported the highest success rate for LLLT (70.6%) versus ESWT (65%) and ultrasound (23.5%). A 2026 trial found high-intensity laser no better than sham (both improved with stretching), so the strongest signal is for low-level laser as an adjunct to stretching/orthotics rather than high-intensity protocols alone.
How strong the finding is
28 studies (20 human, 8 reviews). Key: Cinar 2017 (sham RCT, 850 nm, higher AOFAS-F), Kiritsi 2010 (double-blind RCT, 904 nm, lower pain and fascia thickness), Ulusoy 2017 (LLLT 70.6% vs ESWT 65% vs US 23.5%), Jitpimolmard 2026 (HILT 1064 nm equal to sham).
What complicates this
Most positive trials combine PBM with stretching/orthotics; the recent high-intensity-laser RCT was negative against sham. Wavelengths/doses vary and some samples are small.
Sources (4)




