How quickly does narrowband UVB phototherapy relieve scaly skin?

Scaling is made of excess or shed surface skin and can reflect ongoing inflammation, dryness, or another skin disorder. Narrowband UVB acts on inflammatory skin activity rather than scraping scale away immediately. As the underlying activity settles, scale may become thinner, less frequent, or easier to moisturise away. One patch may improve before another, and temporary redness after exposure can make the treated skin look different while it is recovering.

Keep every phototherapy appointment that you can and tell the clinic about missed sessions so the schedule can be adjusted safely. Apply moisturiser as directed, avoid picking or forcefully removing scale, and do not use additional tanning or ultraviolet treatments unless prescribed. Note changes in thickness, cracking, itch, and tenderness; these details help distinguish steady improvement from irritation.

Contact the phototherapy team for blistering, intense burning, severe redness, bleeding cracks, or worsening soreness after a session. Seek urgent care for facial swelling, breathing difficulty, or a rapidly spreading rash. Arrange a dermatology review if scaling suddenly becomes widespread, painful, or associated with fever, because the cause may need reassessment.

Ask what is causing the scale, when your skin will be reviewed, how to moisturise between sessions, whether any medicines increase light sensitivity, and which changes mean the next session should be delayed.