How long does UV therapy take to manage prurigo nodularis?

Question

Hello doctor,

I am 20 years old and dealing with prurigo nodularis, and it is driving me crazy. I have completed a few sessions of ultraviolet light therapy, but my skin still itches constantly, and the nodules look the same. I have been missing classes because my sleep is severely affected by the itching and scratching. I worry that I am wasting time while the scars continue to build up.

How long does ultraviolet (UV) light therapy usually take to show results at my age?
Am I being impatient, or is the treatment not working for me?
How many weeks does it usually take before people notice relief?
Should the flare-ups calm down first, or does the itching usually improve before the nodules begin to change?

I need some hope that this treatment will actually help. I am honestly losing motivation when nothing seems to change week after week.

Kindly advise.

Answer 1

Hello,

Welcome to iCliniq.

I am sorry that you are dealing with this. Prurigo nodularis can be extremely frustrating, especially when the itching is affecting your sleep and making it difficult to attend classes.

In many people, ultraviolet (UV) light therapy, often narrowband ultraviolet B (NB-UVB), does not produce noticeable improvement after just a few sessions. It is common for treatment to take several weeks, often around 6 to 12 weeks of regular sessions, before significant itch relief or flattening of the nodules becomes apparent.

The itching sometimes starts improving before the nodules visibly shrink, although the order can vary from person to person. A lack of change after only a handful of sessions does not necessarily mean that the therapy is failing.

That said, if you are experiencing severe ongoing itching, worsening lesions, or significant sleep disruption, it is important to inform your skin specialist now rather than waiting silently through treatment. They may be able to adjust the ultraviolet light regimen or add other treatments to help control symptoms while the phototherapy has time to work.

As scratching itself can perpetuate the itch-scratch cycle and contribute to new nodules and scarring, achieving better itch control is an important goal.

If you have been undergoing treatment consistently for many weeks and still see absolutely no improvement, you can discuss with a skin specialist whether another treatment approach might be more effective for you.

Hope you found this useful. For further queries, you can consult me at icliniq.

Thank you.