Is there evidence supporting the use of red light therapy for endometriosis?

Red Light Therapy for Endometriosis: Not Supported by Current Guidelines

Red light therapy is not recommended for the treatment of endometriosis based on current clinical guidelines, which establish medical therapy and surgical excision as the standard of care. The most recent and authoritative guidelines make no mention of light therapy as an appropriate treatment modality 1.

Current Evidence-Based Treatment Standards

The 2024 ACR Appropriateness Criteria for endometriosis clearly establishes that:

• Medical therapies help temporize symptoms
• Surgical excision by a specialist is considered the definitive treatment 1

The 2025 German-Austrian-Swiss guideline (DGGG/OEGGG/SGGG) reinforces this approach, recommending:

• Primary hormone treatment as first-choice therapy
• Surgical interventions and multimodal approaches supplemented on an individual, symptom-oriented basis 2

Limited Research Evidence

While one small randomized controlled trial from 2018 (n=40) examined "pulsed high-intensity laser therapy" and reported improvements in pain, adhesions, and quality of life 3, this study has critical limitations:

• Single small study with no replication
• Not incorporated into any major clinical guidelines
• Used high-intensity laser therapy (different from typical "red light therapy")
• All participants also received standard hormonal treatment, making it impossible to isolate the laser effect
• No long-term follow-up data on morbidity or mortality outcomes

Important Distinction

A 2025 systematic review examined light therapy for primary dysmenorrhea (painful periods without pelvic pathology) and found some benefit 4. However, primary dysmenorrhea is fundamentally different from endometriosis—the former has no identifiable pelvic pathology, while endometriosis involves actual endometrial-like tissue outside the uterine cavity with inflammation and fibrosis 1.

Clinical Recommendation

Patients with endometriosis should receive evidence-based treatment consisting of:

1. First-line: Hormonal therapy for symptom management
2. Definitive treatment: Surgical excision by a specialist when appropriate
3. Multimodal pain management as needed

Common Pitfall to Avoid

Do not delay proven effective treatments (hormonal therapy or appropriate surgical intervention) in favor of unproven modalities like red light therapy, as this may worsen long-term outcomes and quality of life in a condition that already carries significant morbidity and economic burden.