UVA OR UVB PHOTOTHERAPY LIGHT TREATMENT FOR PSORIASIS?
sunlight heals psoriasis
Phototherapy (otherwise known as light therapy), involves exposing the skin to ultraviolet light rays and is commonly used to treat a range of skin conditions including Psoriasis, Vitiligo and Acne. Light Therapy is usually administered on a regular basis either using a home unit or, in some cases, using large clinical units which are only used under medical supervision.
Treatments are done at hospital, in a doctor’s office or psoriasis clinic. However, for mild-moderate cases of Psoriasis and Vitiligo, UVB treatment is increasingly being down at home using handheld units. The key to success with phototherapy is consistency of treatment. There are two forms of light therapy: Ultraviolet light B (UVB) and Ultraviolet light A (UVA) Treatments
UVB phototherapy (light therapy)
UVB rays are present in natural sunlight. UVB phototherapy has been shown to be a very effective treatment for psoriasis. UVB rays penetrate the skin and slows the growth of the skin cells. (Skin cells multiply too rapidly in cases of psoriasis and UVB phototherapy treatment slows that rate to the point where the skin appears normal. UVB phototherapy treatment involves exposing the skin to an artificial UVB light source for a set length of time on a regular schedule. This treatment is commonly administered at home although in severe cases, it may be administered in a medical setting.
During treatment, your psoriasis may worsen (although this will be temporary) before it improves. The skin may redden and itch from exposure to the UVB light rays. If the skin becomes too irritated, the amount of UVB administered may need to be reduced. In some instances, temporary flares ups occur with low-level doses of UVB although these reactions tend to resolve themselves as the treatment continues.
Home UVB phototherapy
Treating psoriasis with a UVB light therapy unit at home is one of the most economical and convenient treatment choices. Just as phototherapy treatment for Psoriasis administered in a clinic requires a consistent treatment schedule. Individuals using home phototherapy treatment for psoriasis and vitiligo should follow manufacturer’s instructions regarding usage and exposure times and should not increase recommended UVB Phototherapy treatment exposures.
Home phototherapy is a medical treatment and it is adviable to monitor your progress with a qualified health care professional. Recommended Home UVB Phototherapy treatment device is the UVB Handheld Phototherapy Unit developed specifically for the treatment of Psoriasis and Vitiligo. For more information on the UVB Handheld Phototherapy Psoriasis Unit click here
Psoralen + UVA (PUVA)
Like UVB, ultraviolet light A rays (UVA) is present in sunlight. however, ulike UVB, UVA is relatively ineffective unless used with a light-sensitizing medication psoralen, which is administered topically or orally. This process, called PUVA, slows down excessive skin cell growth and can clear psoriasis symptoms for varying periods of time. Stable plaque psoriasis, guttate psoriasis, and psoriasis of the palms and soles are most responsive to PUVA treatment.
UVA Light Therapy is only administered under hospital supervision as it is associated with a number of adverse side effects including nausea, itching and redness of the skin. Drinking milk or ginger ale, taking ginger supplements or eating while taking oral psoralen may prevent nausea. Similarly, antihistamines, baths with oatmeal products or application of topical products with capsaicin may help relieve itching.
Sunlight
Although both UVB and ultraviolet light A (UVA) are found in sunlight, UVB works much better for psoriasis. UVB phototherapy treatment units work in exactly the same way as natural sunlight. Short, multiple exposures to sunlight are recommended. Start with five to 10 minutes of noontime sun daily. Gradually increase exposure time by 30 seconds if the skin tolerates it. To get the most from the sun, all affected areas should receive equal and adequate exposure. Remember to wear sunscreen on areas of your skin unaffected by psoriasis.
Avoid overexposure and sunburn. It can take several weeks to see improvement. It is also advisable to visit your doctor or dermatologist to check regularly for sun damage.
Important note: some topical medications can increase the risk of sunburn. These include tazarotene, coal tar, Elidel (pimecrolimus) and Protopic (tacrolimus). Individuals using these products should consult with their doctor before going in the sun.
People who are using PUVA or other forms of light therapy should limit or avoid exposure to natural sunlight unless directed by a doctor.
Tanning beds – should you use them to treat psoriasis?
Contrary to popular belief, tanning beds are not an effective alternative to natural sunlight. This is because tanning beds in commercial salons emit mostly UVA light, not UVB. The beneficial effect for psoriasis is attributed primarily to UVB light. The National Psoriasis Foundation does not support the use of tanning beds as a treatment option for psoriasis.
Most Psoriasis organisations – the American Academy of Dermatology, the FDA and the Centers for Disease Control and Prevention and UK Psoriasis Association – all discourage the use of tanning beds and sun lamps for the treatment of Psoriasis. The ultraviolet radiation from these devices can damage the skin, cause premature aging and increase the risk of skin cancer.
Most practicing dermatologists also discourage psoriasis patients from using tanning beds. Consult with your dermatologist before going to a tanning bed to treat your psoriasis.
Disclaimer: This information is given for informational purposes ONLY. Please consult your GP or dermatologist before using any form of phototherapy.
