Using UVB Phototherapy Units – General Safety Guidance

Quick overview

Detailed Guidance

  • This page provides general, non-medical guidance only
  • We are not dermatologists or medical professionals
  • UVB phototherapy should be started at very low exposure
  • Exposure should be increased slowly and gradually
  • Always stop if irritation occurs and consult a healthcare professional if unsure

UVB phototherapy has been used for many years in clinical (hospital) settings to support skin conditions such as psoriasis, eczema, and vitiligo.

The information below is intended to help users understand general principles of safe use when using an at-home UVB phototherapy unit.

Important:
This guidance does not replace medical advice. We strongly recommend consulting a qualified healthcare professional before starting UVB phototherapy.

A cautious approach is always best

In hospital and dermatology settings, UVB phototherapy is typically started at a very low exposure, regardless of skin type, and then increased gradually over time based on individual tolerance.

We recommend taking the same cautious approach at home.

Everyone’s skin responds differently, and there is no benefit to rushing treatment.

Getting started: general guidance

Initial exposure (start low)

  • Start with 10–20 seconds per session, regardless of skin type
  • Use the unit 2–3 times per week
  • Always allow at least 48 hours between sessions
  • Begin at the lowest comfortable exposure

If you are unsure, always choose the lower end of the time range.

Gradually increasing exposure

Only increase exposure if your skin tolerates the previous session well.

  • Increase exposure very gradually, typically by 10–20 seconds at a time
  • Do not increase every session unless there is no redness, burning, or discomfort
  • Always allow rest days between sessions
  • Do not feel pressure to shorten treatment times — consistency and gradual increases are key

If irritation occurs, stop treatment and allow the skin to recover before resuming at a lower exposure.

Operating the unit (general guidance)

  • The unit is operated using two built-in timers, activated by twisting to set the session time
  • These timers also switch the unit on
  • The maximum timer setting is approximately 4 minutes
  • After each session, ensure the timers are returned to the OFF position

We recommend using a separate personal timer (such as a mobile phone or stopwatch with a built in alarm) to accurately measure exposure time.

Important safety information

Always:

  • Wear the protective goggles provided

Stop use immediately if you experience:

  • burning
  • blistering
  • unexpected irritation

Do not use on:

  • broken skin
  • infected skin
  • highly inflamed areas

Do not exceed recommended exposure times.

If you have previously received UVB phototherapy under medical supervision, you may wish to follow the guidance provided by your healthcare team.

Our role & support

We are always happy to help with:

  • general questions about setup
  • basic operation
  • understanding how the unit works

However, we are unable to advise on:

  • diagnosis
  • treatment plans
  • medical outcomes

For personalised medical advice, please consult a qualified healthcare professional.

Final note

UVB phototherapy should always be approached with care, patience, and respect for your skin. Starting low and increasing gradually is the safest way to use UVB treatment at home.

If you have any questions about the equipment itself, please don’t hesitate contact us on info@uvbtherapy.co.uk