Oral lichen planus
Low-level laser therapy for oral lichen planus
Evidence on LLLT and photodynamic therapy for symptomatic oral lichen planus.
Study count
The cited review/meta-analysis evaluated photodynamic and low-level laser therapy studies for oral lichen planus.
Evidence grade
low
Panel relevance
not-panel-replicable
Bottom line
This is an oral medicine category, not a red light panel category.
Consensus: LLLT may reduce symptoms and may compare similarly to corticosteroids for pain, but evidence remains limited and clinical.
What the studies found
- LLLT before-after studies showed improvements in pain and sign scores.
- LLLT and corticosteroid comparisons did not show pain-score differences.
- Photodynamic therapy did not show conclusive lesion-size improvement.
Dosage and timing
| Wavelengths | Not settled nm |
|---|---|
| Irradiance | Not settled |
| Fluence | Not settled |
| Session time | Oral medicine protocol-specific. |
| Frequency | Varied by study. |
| Duration | Varied by study. |
| Timing | No general timing consensus. |
| Treatment area | Oral mucosal lesions. |
| Device types | Low-level laser therapy and photodynamic therapy. |
| Notes | Photodynamic therapy evidence was less conclusive than LLLT in the cited review. |
- No consumer protocol.
- Requires oral lesion diagnosis and clinician-selected protocol.
- Separate LLLT from photodynamic therapy in content.
Caveats
- Oral lichen planus requires dental/oral medicine evaluation.
- Persistent oral lesions need professional assessment.
Cited peer-reviewed sources
Hoseinpour Jajarm H, Asadi R, Bardideh E, et al. Photodiagnosis and Photodynamic Therapy. 2018.
A review found LLLT may be a corticosteroid alternative for symptomatic oral lichen planus, while photodynamic therapy evidence was inconclusive.
Last reviewed: 2026-06-15