Melasma is a common skin condition that causes dark, patchy discoloration, often triggered by sun exposure, hormones, or heat. Many people wonder if red light therapy (RLT)—a popular treatment for acne, wrinkles, and inflammation—could help or worsen melasma.
Does Red Light Therapy Affect Melasma?
Red light therapy (typically 630nm–660nm) is generally considered safe for melasma because:
It does not produce UV rays (unlike sunlight, which worsens melasma).
It may help reduce inflammation and improve skin repair.
However, some concerns exist:
Heat Sensitivity – Some RLT devices emit mild heat, which could trigger melasma in heat-sensitive individuals.
Higher Wavelengths (Near-Infrared, 800nm+) – These penetrate deeper and might stimulate pigment-producing cells (melanocytes), potentially worsening melasma in rare cases.
How to Use RLT Safely for Melasma
- Stick to 630nm–660nm red light (avoid infrared if prone to pigmentation).
- Keep sessions short (5–10 minutes) to minimize heat exposure.
- Monitor skin response—if melasma darkens, discontinue use.
- Always wear sunscreen—melasma can flare with any light/heat exposure.
Bottom Line
Most people with melasma tolerate low-heat red light therapy (630nm–660nm) well, but results vary. If you’re concerned, consult a dermatologist before starting.