Ultraviolet light therapy

Ultraviolet Light Therapy

Ultraviolet (UV) light therapy, also known as phototherapy, is a medical treatment that involves exposure to ultraviolet light to treat various skin conditions. This form of therapy utilizes specific wavelengths of UV light and has been found effective in managing conditions such as psoriasis, eczema, vitiligo, and lichen planus, among others. The therapy can be administered using different types of UV light, including UVA, UVB, and narrow-band UVB, each having distinct applications and effectiveness.

Types of Ultraviolet Light Therapy

UVA Therapy

UVA therapy requires the use of a medication called psoralen which makes the skin more sensitive to UV light. This combination, known as PUVA (psoralen plus UVA), is particularly effective for severe skin conditions. Patients undergoing PUVA may take psoralen orally or apply it topically and are then exposed to UVA light.

UVB Therapy

UVB therapy involves the use of UVB light without the need for a photosensitizing agent. It can be delivered as broadband UVB or narrowband UVB, with the latter being more commonly used due to its higher efficacy and reduced risk of skin cancer.

Narrow-band UVB Therapy

Narrow-band UVB therapy emits a narrower range of UV wavelengths, targeting the most therapeutic wavelengths for skin treatment. It is considered safer and more effective than broadband UVB for the treatment of several skin conditions.

Indications

Ultraviolet light therapy is indicated for several dermatological conditions, including:

• Psoriasis
• Eczema (Atopic Dermatitis)
• Vitiligo
• Lichen Planus
• Mycosis Fungoides (a type of skin lymphoma)

Procedure

The procedure for UV light therapy typically involves standing in a specially designed cabinet that emits UV light. The duration and frequency of treatment vary depending on the condition being treated and the type of UV therapy being used. Treatment sessions may range from a few seconds to several minutes and are usually conducted 2 to 3 times per week.

Risks and Side Effects

While UV light therapy is generally safe, it does carry some risks and potential side effects, including:

• Skin aging
• Increased risk of skin cancer
• Burns or irritation from overexposure
• Eye damage if proper eye protection is not used

Patients are advised to discuss the potential risks and benefits of UV light therapy with their healthcare provider.

Conclusion

Ultraviolet light therapy is a valuable treatment option for several skin conditions, offering relief for many patients. However, it is important for individuals to consider the potential risks and to undergo treatment under the supervision of a qualified healthcare professional.