Yes, tanning beds are frequently and dangerously misunderstood as a natural or DIY alternative to medical phototherapy for psoriasis. While it is true that many psoriasis patients see their skin clear after exposure to specific types of ultraviolet (UV) light, commercial tanning beds are not designed for medical treatment. In the UK, the NHS and the British Skin Foundation strongly advise against using sunbeds to manage skin conditions. The clearance provided by a sunbed is often temporary, inconsistent, and comes with a significantly higher risk of skin cancer and premature aging compared to hospital-monitored light therapy.
What We’ll Discuss in This Article
- The clinical difference between UVA (Sunbeds) and Narrowband UVB (Medical).
- Why a base tan does not protect or heal the skin.
- The risks of burning and the Koebner Phenomenon.
- How sunbeds increase the risk of Squamous Cell Carcinoma and Melanoma.
- The danger of combining sunbeds with psoriasis medications.
- Why controlled hospital phototherapy is the only safe UV option.
1. UVA vs. UVB: The science of the spectrum
The biggest misconception is that all UV light is the same. Natural sunlight consists of both UVA and UVB rays, but they affect the skin very differently.
- Medical Phototherapy (Narrowband UVB): This is the gold standard used in UK hospitals. It uses a very specific wavelength (311nm) that penetrates the epidermis to slow down the rapid cell turnover of psoriasis. It is highly effective and carries a lower risk profile when administered by a nurse.
- Commercial Sunbeds (UVA): Sunbeds primarily emit UVA radiation. UVA penetrates deeper into the dermis and is mostly responsible for tanning and skin aging. While UVA can help psoriasis, it usually requires a sensitizing medication (PUVA) to be effective. Using a sunbed without this medication often requires very high doses of radiation to see any change in the skin, which is extremely damaging.
2. The risk of the Koebner Phenomenon
Commercial sunbeds are notoriously difficult to calibrate for medical needs. If a psoriasis patient spends too long in a sunbed and develops even a mild burn, they risk triggering the Koebner Phenomenon.
- The Reaction: This is where new psoriasis plaques form at the site of any skin injury, including a UV burn.
- The Result: Instead of curing the psoriasis, the sunbed can cause a massive flare-up that covers previously clear areas of the skin.
3. Skin Cancer and Aging Risks
Psoriasis patients often need long-term management. If you use sunbeds as your primary treatment, you are accumulating a massive lifetime dose of UV radiation.
- Carcinogenesis: Sunbed use increases the risk of both non-melanoma skin cancers (Basal and Squamous Cell Carcinoma) and malignant melanoma.
- Photo-aging: UVA rays break down collagen and elastin. Using sunbeds for psoriasis can lead to leathery skin, deep wrinkles, and permanent pigmentation changes (sun spots) much earlier in life.
4. Dangerous Medication Interactions
Many common treatments for psoriasis make your skin photosensitive, meaning you will burn much faster than a person not taking these medications.
- Topical Treatments: Coal tar, retinoids (like tazarotene), and some steroids can make the skin highly sensitive to UV.
- Systemic Medications: If you are taking methotrexate or certain biologics, using a sunbed can lead to severe, blistering burns that require emergency medical attention.
5. Why Hospital Phototherapy is different
If you feel that UV light helps your skin, you should ask your GP for a referral to a Dermatology Phototherapy Unit.
- Precision: The dose is calculated specifically for your skin type and adjusted every session.
- Safety: Nurses monitor your skin for any signs of redness and protect sensitive areas (like the eyes and genitals) that sunbeds often ignore.
- Mapping: Your total lifetime dose is recorded to ensure you do not exceed the safe limit for skin cancer risk.
Conclusion
Tanning beds may offer a seductive quick fix for visible plaques, but they are a risky and scientifically flawed substitute for medical care. The clearance they provide is unpredictable and comes at the cost of long-term skin health. In 2026, the clinical consensus remains firm: sunbeds are not a medical treatment. If your psoriasis is severe enough to require UV light, it is severe enough to require the precision and safety of an NHS phototherapy department.
Can I use a sunbed just once to dry out a patch?
No. Psoriasis is not wet, and drying it out with UV can lead to cracking and secondary infection. It is an internal immune issue, not a surface moisture problem.
Is a Vitamin D sunbed safe?
Most sunbeds are inefficient at producing Vitamin D compared to a simple, cheap oral supplement. The cancer risk of the sunbed far outweighs any Vitamin D benefit.
Why does my skin itch more after a sunbed?
UV radiation and the heat of the bed dry out the skin barrier and increase inflammation in the short term, which often leads to a rebound itch.
What is PUVA?
PUVA is a medical treatment where you take a pill (psoralen) to make your skin sensitive to UVA light, then enter a medical light box. This is not the same as using a commercial sunbed.
Does a tan help hide psoriasis?
While a tan might mask the redness of a plaque, the plaque itself will often remain thick and scaly, and the surrounding skin will darken, sometimes making the white scales of psoriasis look even more prominent.
How many sessions of medical phototherapy are usually needed?
A typical course of Narrowband UVB is 3 sessions a week for 8 to 12 weeks. Most patients see significant clearance that can last for several months.
Is it safe to use a sunbed if I have eczema?
No. Eczema-prone skin is even more sensitive to heat and salt (from sweat in the bed), and UVA can be extremely drying, often leading to a severe eczema flare.
Authority Snapshot (E-E-A-T Block)
This article examines the clinical risks of using commercial tanning beds for medical conditions. It is written by the MyPatientAdvice Medical Writing/Research Team and reviewed by Dr. Rebecca Fernandez, a UK-trained physician with experience in dermatology and oncology. All information is strictly aligned with the safety guidelines provided by the NHS and the British Association of Dermatologists for 2026.
