How effective is narrowband UVB phototherapy for atopic dermatitis?

The treatment delivers a carefully controlled band of ultraviolet B light to affected skin. It may be considered when eczema covers broad areas, returns often, or has not settled with an appropriate topical plan. It is supervised because the dose must match your skin response, and the eyes and unaffected areas may need protection.

Relief usually develops across repeated appointments rather than after a single exposure. Dryness, temporary redness, tanning, or a sunburn-like reaction can occur, so the clinician adjusts or pauses treatment when needed. Learn more about [Atopic Dermatitis](/conditions/atopic-dermatitis/) and [Narrowband UVB Phototherapy](/treatments/medical-dermatology/narrowband-uvb-phototherapy/).

Attend appointments consistently, use moisturiser as directed, and report any burning or unusual reaction before the next session. Tell the clinic about medicines that increase light sensitivity, a history of skin cancer, frequent cold sores, or previous light treatments. Do not add sun exposure to the treatment plan unless your dermatologist specifically advises it.

Contact the clinic for blistering, intense tenderness, persistent redness, eye discomfort, or a reaction that is worsening. Seek urgent help for facial swelling, breathing difficulty, or rapidly spreading skin pain, which may signal a severe reaction or infection rather than an expected treatment response.

Ask: Why is phototherapy suitable for my eczema pattern? What improvement should we track? Which medicines or products affect light sensitivity? How will the dose be adjusted? When will we review the plan?