Patient Tools
We've collected a number of helpful tools to keep you on the path to healthy skin, including treatment time/dose calculators, a treatment log, a video library full of useful tutorials, links to our Smartphone app, and more.

Living with Skin Conditions

Daavlin strives to provide the best in current information and resources about phototherapy and related healthcare issues. Visit our resources page for a list of support groups, a lifestyle blog, and a medical article library.

Frequently Asked Questions

  • Are there medications I shouldn't take while treating with phototherapy?

    It is important to know that some topicals may actually hinder treatment. For example, some lotions contain UV absorbing ingredients similar to those used in sunscreens and may block much of the benefit of phototherapy treatment.

    Other topicals and medications may photosensitize your skin. Watch out for lotions containing photosensitizing agents or essential oils such as lime, lemon, or orange. Such ingredients could cause an unexpected erythemal reaction when exposed to the ultraviolet energy delivered during a phototherapy treatment. In addition, coal tar, psoralens, and retinoids will consistently photosensitive your skin to UV light.  For a detailed list of photosensitizers, visit this link: We recommend speaking with your doctor about topicals and medications that may impact your phototherapy treatments.

  • How long do I need to wait before I begin to see results?

    The length of time varies from patient to patient and between conditions. Typically psoriasis patients will see much faster results than vitiligo patients. The most important thing is to be consistent with your treatments, and to follow your doctor’s treatment plan.

  • My skin turned red after my treatments. What do I do?

    Occasional or temporary redness may be normal if it resolves by the next treatment time. If your redness is sustained, ask your doctor if you should reduce your treatment times.

  • Can I expose my “healthy” skin to the light or do I need to cover it?

    It’s usually best to keep uninvolved skin covered with clothing or sunscreen during your treatments, but follow your doctor’s advice. The most important thing about covering “healthy” skin is to be consistent, and always use the same covering techniques for each treatment. (External genitalia should be covered during PUVA therapy.)

  • If my device is located in a cold room, do I need to allow time for the lamps to warm up?

    With a dosimetry machine, there is no real advantage to allowing your machine to warm up first. In situations where a machine is kept in a very cold environment such as a garage, a 5-minute warmup may allow faster treatment times.

  • Should I treat for the same amount of time that I treated for in the doctor’s office?

    Every device has a different level of therapeutic output. Follow your doctor’s directions for dosing advice. If you have questions about how to program your machine to deliver the doses your doctor provides, please contact technical support.

  • What is a good room to do my treatments in?

    Choose a dry, enclosed room where others will not be exposed to the light. Optimum treatment times and lamp life will occur when the machine is kept in a room temperature area that is neither extremely hot nor cold.

  • I’m seeing good results with my phototherapy treatments, other than my face. Is it possible the light is working everywhere except for my face?

    For best results, make sure all makeup or anything covering your face has been removed. Additionally, since the face is almost always exposed to light, it may have “photoadaptation,” meaning it has become used to this light exposure. Ask your dermatologist if you could benefit from a higher treatment dosage.

  • Why is my treatment time/dose at my doctor's office different than my treatment time/dose using my home device?
    This is because the output of your doctor's device is different than the output of your home device. To be safe, your doctor will typically prescribe a lower starting time/dose for use on your home device, then recommend an increase back up to what you were receiving in their office.
  • My device says "HOLD." What does this mean?

    This means that your treatment is paused. Press ENTER to resume or END to cancel the treatment.