Light therapy (also called phototherapy) works by exposing your skin to specific wavelengths of light that slow down the overactive skin cell production that causes psoriasis symptoms. Between 50% and 90% of people who try it see noticeable improvement, and for some, symptoms clear up entirely. There are a few main types of Show Full Answer
Light therapy (also called phototherapy) works by exposing your skin to specific wavelengths of light that slow down the overactive skin cell production that causes psoriasis symptoms. Between 50% and 90% of people who try it see noticeable improvement, and for some, symptoms clear up entirely. There are a few main types of light therapy used for psoriasis:
- Narrowband UVB – The most common type, delivered 2–3 times per week under medical supervision. It's also available as a home unit.
- Excimer Laser – A targeted treatment that focuses only on affected areas, which helps protect healthy skin.
- PUVA – Combines a light-sensitizing drug (psoralen) with UVA light. It's typically a second-line option.
- Balneophototherapy – A bath in warm saltwater followed by UV light exposure.
- Red Light Therapy (RLT) – A newer, emerging option that penetrates deeper into the skin and works differently from UV-based treatments. Early studies show promising results, but more research is still needed. It's worth knowing that light therapy does come with some potential side effects, including skin irritation, itching, and a long-term increased risk of skin cancer. PUVA carries a slightly higher skin cancer risk than narrowband UVB.
Treatment typically runs 3 times per week for 4 weeks to 3 months. As one MyPsoriasisTeam member noted, keeping up a maintenance schedule after clearing can help hold flares at bay for longer.
Always work with a dermatologist to find the right type and dosage for your skin.
June 1
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