Psoriasis is a skin condition characterized by patches of scaly, dry, itchy skin. Skin may also become hardened and raised in lesions as a result of the disease. Creams and ointments applied to the skin can control mild to moderate symptoms in many people, according to the National Psoriasis Foundation. Topical medications may not be sufficient to reduce the effects of moderate to severe psoriasis. UV treatments, also called light therapy, or phototherapy, may be used to promote healing and a decrease of psoriasis symptoms.
Usage
People who have symptoms of psoriasis on 3 to 10 percent of their body's skin are considered to have mild to moderate psoriasis. UV treatments are most effective when used on this population.
Purpose
The purpose of UV treatments is to slow down the rapid growth of skin cells below the epidermal surface. Exposure of ultraviolet rays can achieve this goal in many people.
Types
Different types of phototherapy may be used as a treatment for psoriasis. Application of ultraviolet B rays and UVA rays in conjunction with a medicine called Psoralen are performed in a doctor's office or medical facility. Home UVB treatments are another option for psoriasis sufferers.
Time Frame
Light therapy is administered in small doses to reduce the risk of side effects but may be repeated for several weeks or months until the condition of the skin has improved.
Side Effects
Phototherapy side effects can include skin irritation, dryness, blistering and an increased risk of melanoma. Side effects of the medication used with UVA treatments can include nausea and itching of the skin.
