Introduction

Psoriasis is a chronic skin condition that can be treated in several ways. One of the effective treatments is phototherapy, also known as light therapy. In this treatment, the skin is exposed to specific types of ultraviolet (UV) light under medical supervision. This guide explains when phototherapy is used and what patients can expect during treatment.

What is Phototherapy?

Phototherapy uses natural or artificial ultraviolet light to treat psoriasis. The most common types are:
- Narrowband UVB: The most common and safe type for psoriasis.
- Broadband UVB: Less commonly used today.
- PUVA (Psoralen + UVA): A stronger form that combines a light-sensitizing medication (psoralen) with UVA light.

When is Phototherapy Recommended?

Phototherapy is usually recommended when:
- Psoriasis is widespread or moderate to severe.
- Topical treatments are not effective.
- The patient cannot take systemic medications.
- Psoriasis affects quality of life significantly.

Treatment Protocols

Phototherapy is given in a clinic or hospital setting under a dermatologist's supervision. Treatment details include:
- Usually given 2–3 times a week.
- The number of sessions varies, often 20–30 for visible improvement.
- Skin is exposed to light for a short, controlled period.
- Eye protection is provided.
- PUVA requires taking psoralen 1–2 hours before exposure.

Benefits and Possible Side Effects

Benefits:
- Reduces inflammation and slows down skin cell growth.
- Helps in long-term control of psoriasis.

Possible Side Effects:
- Temporary redness, itching, or dryness.
- Increased risk of sunburn-like reactions.
- Long-term use may increase the risk of skin aging or skin cancer (especially with PUVA).

Safety Tips

- Always follow your dermatologist’s instructions.
- Do not use tanning beds as a substitute.
- Protect your eyes and genital areas during treatment.
- Inform your doctor about any new medications.

Conclusion

Phototherapy is a safe and effective treatment for many people with psoriasis. With proper guidance and follow-up, it can greatly improve symptoms and quality of life. Always talk to your dermatologist to see if phototherapy is the right choice for you.