What Is Narrowband UVB Phototherapy Done With?

Treatment is usually delivered in a clinic using a standing cabin, a smaller unit for a limited body area, or a hand-held device. The equipment is designed to provide a measured exposure while shielding areas that do not need treatment. Eye protection is used when appropriate, and sensitive areas may be covered according to the treatment plan.

The UVB light acts on overactive skin inflammation and pigment-producing cells in ways that can help conditions such as psoriasis, vitiligo, and eczema. It is different from a tanning bed: the clinician selects the exposure for medical treatment, and the skin is monitored between visits.

Tell the clinic about medicines, supplements, previous reactions to sunlight, eye problems, and any new rash or infection before treatment. Arrive with clean skin unless your clinic gives different instructions, and avoid applying perfumes or unapproved products immediately beforehand. Wear the protective clothing or eyewear requested by the team.

Attend sessions on the schedule provided because the exposure plan is adjusted according to your skin response. Do not add sunbathing or tanning-bed exposure to the plan. Details about the equipment are available in the [NB-UVB Phototherapy Cabin](/technology/nb-uvb-phototherapy-cabin/) guide.

Contact the clinic if treated skin develops intense redness, blistering, marked pain, or swelling after a session. Seek urgent help for facial swelling, breathing difficulty, or a widespread allergic reaction. Report new eye discomfort or vision changes promptly, particularly after inadequate eye protection.

Ask which device will be used, which areas will be exposed, how your dose will be adjusted, what to apply afterward, and whether your medicines affect light sensitivity.