At Cahaba Dermatology, we offer NB-UVB for psoriasis and vitiligo treatment. We are experts at treating psoriasis and will help you get clear skin faster. We are one of the few treatment centers for psoriasis in Alabama and offer a therapeutic spectrum for psoriasis from UV light therapy and an eximer laser, to oral, topical and injectable treatments.

How does UVB work?

UVB inhibits DNA synthesis, which may, in turn, inhibit the overgrowth of skin cells seen in psoriasis plaques. UVB also promotes the self-destruction of T lymphocytes, the immune cells that gather in psoriasis plaques and trigger inflammation. Finally, UVB increases cellular production of several substances that reduce inflammation. Some combination of these mechanisms may explain how UVB exposure controls psoriasis.


How are they administered?

Patients usually receive treatments three times a week for several months at a dermatologist’s office or clinic. Before beginning treatment, patients are generally evaluated to determine the maximum amount of light they can tolerate without developing erythema, or reddening of the skin (the Minimal Erythema Dose (MED)). Treatment begins at a lower exposure (50% MED, for example), and the exposure is gradually raised.

To improve effectiveness, NB-UVB is sometimes used in combination with topical treatments such as vitamin D3 analogues (calcipotriene) or retinoids (tazarotene) or with systemic medications.

How well do they work?

NB-UVB is superior for treating plaque psoriasis. NB-UVB is works well even at doses significantly below the MED, so patients experience fewer side effects. One review of the available clinical trial data concluded that psoriasis clears completely for 63-80% of patients who use NB-UVB; another similar review found that 55% of patients experience a 75% reduction in psoriasis severity (PASI75) after 12 weeks of treatment.

When will my psoriasis clear?

Clearance can take a while—most patients need 15 to 20 treatments to see a 50% reduction in psoriasis severity, which corresponds to 5 – 7 weeks if following the typical three times per week treatment schedule.

If you have questions or concerns about caring for your skin, you should make an appointment to discuss treatment. Call us at 205-214-7546.


Psoriasis – Narrowband UVB light treatment provide faster clearing, less sun burning, and more complete disease resolution than traditional UVB and is much safer than biologics.

Vitiligo – Narrowband UVB lights are proving to be very useful in the treatment of Vitiligo. Narrowband UVB light treatment is replacing traditional PUVA phototherapy treatment. UVB narrowband lamps for vitiligo require no photosensitizing agents. People have been using ultraviolet (UV) light in the form of sunlight to treat psoriasis for more than a century, and most psoriasis patients still find that their symptoms improve during the sunnier months of the year. But these days, light therapy, or phototherapy, for psoriasis can involve exposure to specially designed UV lamps in the setting of a dermatology clinic. At Cahaba Dermatology we offer both UVB, UVA and excimer phototherapy. There are several types of artificial UV light therapy: broadband UVB (BB-UVB), narrowband UVB (NB-UVB), psoralen plus UVA (PUVA), and targeted therapies including the excimer laser. Each is quite effective at improving psoriasis.