Phototherapy or light therapy is a prescription treatment that is prescribed by a dermatologist. Phototherapy involves exposing the skin to ultraviolet light and is used to treat skin disorders such as:
A phototherapy unit can range from hand-held and table-top devices for spot treatment of small areas to cabinet or “walk-in” units for patients requiring full body treatment.
The medical lamps in these phototherapy units emit ultraviolet (UV) light in a wavelength that creates changes within the skin cells. The cells in most patients then begin to behave normally, which reduces or eliminates the symptoms of the skin disease.