A rash after a tanning bed session is more common than most people realise — and it can happen even to experienced tanners. The good news is that most tanning bed rashes are temporary, resolve within a few days, and are preventable once you understand what’s causing them.

Tanning bed rashes are most commonly caused by UV overexposure, heat rash from sweating in the bed, contact with bacteria or cleaning product residue on the bed surface, or an allergic reaction to a tanning lotion. A less commonly known but very frequent cause is polymorphic light eruption (PMLE) — a UV-triggered immune response that often affects people new to tanning beds or those returning after a long break.

Here’s a full breakdown of what causes tanning bed rashes, how to treat them at home, when you need to see a doctor, and how to prevent them from happening again.

Key Takeaways

Most tanning bed rashes are caused by UV overexposure, heat rash, contact dermatitis, or polymorphic light eruption (PMLE)
PMLE is a very common UV-triggered immune response — it frequently affects new tanners and those returning after a break
Cool or lukewarm water — not warm water — should be used on a rash. Warm water worsens inflammation
Over-the-counter hydrocortisone cream and oral antihistamines are the most effective first-line treatments for most tanning bed rashes
Stop tanning immediately if a rash develops — continuing will make it significantly worse
Always wipe down the tanning bed before use with hypoallergenic wipes, regardless of the salon’s cleaning practices
Building session time gradually is the most effective way to prevent UV-overexposure rashes
See a doctor if the rash is blistering, spreading rapidly, accompanied by fever, or hasn’t improved after 5–7 days

What Does a Tanning Bed Rash Look Like?

Tanning bed rashes can look different depending on their cause, which is part of what makes them confusing to identify. The most common presentations are:

Small red or pink bumps — often widespread across the chest, arms, and legs. This is the typical appearance of UV overexposure or PMLE
Raised, itchy welts or hives — often a sign of an allergic reaction to a tanning product or cleaning residue on the bed
Tiny clear or white blisters in areas that sweat — characteristic of heat rash (miliaria), typically appearing in skin folds and areas of high contact with the bed surface
Localized redness and inflammation — can indicate UV burn rather than a rash, particularly if it follows the pattern of the bed’s lamp layout

Rashes most commonly appear on the chest, arms, legs, and abdomen — the areas with highest UV exposure in the bed. They typically develop within a few hours of the session but can appear up to 24–48 hours later in the case of PMLE.

What Causes a Tanning Bed Rash?

UV Overexposure

The most straightforward cause — too much UV radiation for the amount your skin can currently handle. Tanning beds produce a concentrated mix of UVA and UVB radiation, and the intensity is significantly higher than typical outdoor sunlight exposure. When the skin receives more UV than it can manage, the inflammatory response produces a rash alongside the more recognizable signs of a burn.

This is especially common in first-time tanners, those who have increased their session time too quickly, or those who have moved to a higher bed level before their skin has adapted. Starting with short sessions of 4–6 minutes and building gradually is the most effective way to avoid this. For more on managing session times safely, see our guide on how to get the best tan in a tanning bed.

Polymorphic Light Eruption (PMLE)

Polymorphic light eruption is one of the most common UV-triggered skin conditions, yet many tanners have never heard of it. It’s an immune-mediated reaction to UV exposure — the immune system identifies UV-modified skin proteins as foreign and mounts an inflammatory response, producing an itchy rash typically within hours of UV exposure.

PMLE is particularly common in people who are new to tanning beds, those who have had a long break from UV exposure, and those with fair skin. The reaction is often described as small, intensely itchy red papules or plaques that appear on UV-exposed areas. Unlike simple overexposure, PMLE tends to recur with each tanning session until the skin develops a degree of UV tolerance — a process sometimes called “hardening.” Gradually increasing UV exposure over consecutive sessions is the main approach to managing it.

If you notice a recurring itchy rash that appears specifically on UV-exposed areas and develops within hours of tanning, PMLE is the most likely explanation. A dermatologist can confirm the diagnosis if needed.

Heat Rash (Miliaria)

Heat rash — medically termed miliaria — occurs when sweat becomes trapped beneath the skin’s surface rather than evaporating normally. In a tanning bed, the combination of heat from the UV lamps, close contact with the bed’s acrylic surface, and reduced airflow creates exactly the conditions that cause sweat to become blocked in the sweat ducts. The result is tiny clear or white blisters or red bumps, most commonly in areas where the body was in contact with the bed.

Heat rash is different from a UV-driven rash — it’s the heat and sweating, not the radiation, that causes it. Tanning nude or in minimal clothing reduces the areas of contact and allows sweat to evaporate more freely. Keeping sessions shorter also reduces the amount of heat buildup that triggers it. Stand-up tanning booths reduce the risk further since your body makes less sustained contact with a surface compared to a lay-down bed. For a comparison of both options, see our guide on stand-up vs lay-down tanning beds.

Contact Dermatitis — From the Bed or Products

Contact dermatitis is an allergic or irritant skin reaction triggered by direct contact with a substance. In the tanning bed context, there are two main sources:

Cleaning product residue on the bed — the disinfectants used to clean tanning beds can leave residue on the acrylic surface, particularly if the salon doesn’t allow adequate drying time after cleaning. When your bare skin is in prolonged contact with these residues under UV heat, a contact dermatitis reaction can develop. Research has confirmed bacterial and chemical contamination of tanning bed surfaces as a real concern when hygiene protocols aren’t followed correctly [Brooks et al., Journal of the American Academy of Dermatology, 2010]
Tanning lotions, bronzers, or accelerators — fragrances, preservatives, and certain active ingredients in tanning products can trigger allergic reactions in sensitive skin. If you’ve changed products recently and developed a rash, the new product is the likely culprit

Dry Skin

Chronically dry skin is significantly more reactive to UV exposure and more prone to developing a rash or irritation after tanning. The skin barrier is compromised in dry skin, meaning UV radiation and heat penetrate more easily and trigger inflammatory responses more readily. Keeping skin consistently moisturized in the days between sessions — not just on tanning days — makes a meaningful difference to how skin tolerates tanning bed use.

Photosensitizing Medications

A number of commonly prescribed and over-the-counter medications increase the skin’s sensitivity to UV radiation, making rashes and burns far more likely even at session lengths that would normally be well-tolerated. These include certain antibiotics (particularly tetracyclines and fluoroquinolones), some antidepressants, diuretics, retinoids, and some anti-inflammatory medications.

If you’ve recently started a new medication and begun developing rashes after tanning that didn’t occur before, photosensitivity from the medication is a strong possibility. Check the medication’s information leaflet for UV sensitivity warnings, and speak to your GP or pharmacist before continuing tanning sessions while taking it.

How to Treat a Tanning Bed Rash

Stop Tanning Immediately

The first and most important step is to pause all tanning — both indoor and outdoor — as soon as a rash develops. Continuing to expose irritated or reactive skin to UV radiation will make the rash significantly worse and extend the recovery time. Don’t return to a tanning bed until the rash has completely resolved and your skin feels normal again.

Cool the Skin With Cool or Lukewarm Water

Use cool or lukewarm water to gently rinse the affected area — not warm water. Warm water causes vasodilation (widening of blood vessels near the skin surface) which increases inflammation and worsens redness and discomfort. Cool water has the opposite effect — it reduces inflammation, soothes the skin surface, and provides immediate relief from itching. Use a gentle, fragrance-free cleanser if washing is needed and pat dry without rubbing.

Apply Over-the-Counter Hydrocortisone Cream

For rashes involving redness, inflammation, and itching, a 1% hydrocortisone cream (available without prescription) is the most effective and appropriate first-line topical treatment. Applied thinly to the affected area once or twice daily, it reduces the inflammatory response directly and provides meaningful relief from itching. Don’t use it on broken skin, and don’t apply for more than 7 consecutive days without guidance from a healthcare professional.

Take an Oral Antihistamine

If the rash is itchy or has the appearance of an allergic reaction — raised welts, hives, or widespread itching — an oral antihistamine (such as cetirizine or loratadine, both available over the counter) addresses the histamine-driven reaction from the inside rather than just soothing the surface. Non-drowsy formulations taken once daily are typically sufficient for most tanning-related allergic rashes.

Try an Oatmeal Bath

Colloidal oatmeal has well-documented anti-inflammatory properties — its active compounds (avenanthramides) inhibit inflammatory pathways and have demonstrated anti-itch effects [Sur et al., Journal of Drugs in Dermatology, 2008]. Adding colloidal oatmeal to a lukewarm bath and soaking for 15–20 minutes can meaningfully reduce itching and inflammation.

Use cool to lukewarm water — not hot. Add 1–2 cups of finely ground plain oatmeal (colloidal oatmeal, or plain oats blended to a fine powder) to the bath and soak the affected areas for 15–20 minutes. Pat dry gently afterward and follow with a fragrance-free moisturizer. If you have a known sensitivity or allergy to oats, skip this remedy.

Apply Pure Aloe Vera Gel

Aloe vera gel provides cooling, soothing relief and has genuine anti-inflammatory properties. Apply a generous layer of pure aloe vera gel (from the plant directly, or a commercial gel containing high aloe concentration and no alcohol or added fragrance) to the affected area. It can be applied several times throughout the day as needed and works particularly well when stored in the refrigerator for an additional cooling effect on application.

Keep the Area Moisturized

Apply a gentle, fragrance-free, alcohol-free moisturizer to the affected area 2–3 times daily. Keeping the skin well-hydrated supports the healing process, reduces flaking and cracking, and prevents the itching that dry, healing skin typically causes. Avoid heavy or fragrant lotions during recovery as these can cause additional irritation on sensitized skin.

Avoid Tight Clothing and Friction

Tight-fitting clothing rubbing against a rash significantly worsens irritation and can delay healing. Wear loose, breathable fabrics over affected areas — cotton is ideal — and avoid any synthetic or rough-textured materials until the rash has resolved.

When to See a Doctor

Most tanning bed rashes are mild and resolve within a few days with home care. However, some situations require professional medical attention:

The rash is blistering — blistering indicates a more serious UV injury or allergic reaction that needs medical assessment
The rash is spreading rapidly — rapid spread suggests an allergic reaction that may need prescription treatment
You develop a fever or feel unwell — systemic symptoms alongside a rash can indicate infection or a more serious reaction
The rash hasn’t improved after 5–7 days of home treatment — persistent rashes may need prescription-strength treatment or a diagnosis from a dermatologist
The rash is very painful rather than just itchy — significant pain, particularly with blisters, warrants medical review
You have a history of skin conditions (eczema, psoriasis, lupus) — UV exposure can trigger flares of these conditions, and a doctor should be consulted before returning to tanning beds

Don’t delay seeking advice if you’re unsure. A short consultation with a GP or dermatologist is far preferable to risking a worsening reaction by continuing to manage it alone.

How to Prevent Tanning Bed Rashes

Build Session Time Gradually

UV overexposure is the leading cause of tanning bed rashes, and the most reliable way to prevent it is to start with very short sessions — 4–6 minutes on a low-level bed — and increase time incrementally only after your skin has demonstrated it tolerates the current level well. Rushing this process is the fastest route to a rash. Follow the 24-hour rule between sessions and never push session length based on feeling comfortable during the session — UV reactions develop hours after exposure, not during it.

Wipe Down the Bed Before Every Session

Even in reputable salons, always wipe down the tanning bed surface yourself with hypoallergenic wipes before getting in. This removes any cleaning product residue, bacteria, or other surface contamination from the previous session’s use. It takes 30 seconds and significantly reduces the risk of contact dermatitis. Bring your own wipes rather than depending on what the salon provides.

Keep Skin Consistently Moisturized

Dry skin is more reactive to UV and more prone to developing a rash. Build daily moisturizing into your routine between sessions — not just on tanning days. Well-hydrated skin has a more intact barrier, tolerates UV exposure better, and recovers faster between sessions. For how this connects to tanning bed care, see our article on getting relief from tanning bed burns.

Review Your Tanning Products

If you develop a rash consistently after using a particular lotion, bronzer, or accelerator, the product is the likely cause. Switch to a fragrance-free, hypoallergenic formula and see if the rash resolves. Introduce new products one at a time so you can identify the culprit clearly if a reaction develops.

Choose a Reputable Salon With Clear Hygiene Standards

A well-maintained salon with visible hygiene protocols — staff who clean beds between users, cleaning products available in the tanning room, and well-serviced equipment — significantly reduces your risk of contact-related rashes. Ask about their cleaning routine before committing to a membership. Reading recent reviews that specifically mention cleanliness is also a useful filter when choosing a salon.

Consider Stand-Up Booths Over Lay-Down Beds

Stand-up booths reduce the sustained contact your skin has with the tanning bed surface, which lowers the risk of both heat rash and contact dermatitis from surface residue. If you find you consistently develop rashes in lay-down beds, switching to a stand-up booth at the same salon is worth trying before concluding that tanning beds in general don’t agree with your skin.

Check Your Medications Before Tanning

If you’ve started a new medication, check whether it lists photosensitivity as a side effect before resuming tanning bed use. Your pharmacist can advise on this quickly. Some medications require you to avoid UV exposure entirely while taking them — not just reduce session time.

Apply Aloe Vera After Every Session

Applying aloe vera gel after each tanning session — even when no rash is present — helps calm any mild UV-induced inflammation before it has a chance to develop into a visible rash. It also helps maintain skin moisture and supports faster recovery between sessions. For more information about preventing tanning bed itch more broadly, our dedicated guide covers additional strategies.

Frequently Asked Questions

What does a tanning bed rash look like?

Tanning bed rashes vary in appearance depending on the cause. The most common presentation is small red or pink bumps across the chest, arms, and legs — typical of UV overexposure or PMLE. Heat rash appears as tiny, clear or white blisters in areas where the skin was in contact with the bed surface. Allergic reactions from products or cleaning residue tend to produce raised, itchy welts or hives. Most rashes develop within a few hours of the session but PMLE can appear up to 24–48 hours later.

How long does a tanning bed rash last?

Most mild tanning bed rashes resolve within 3–7 days with appropriate home care — stopping tanning, cooling the skin, and using hydrocortisone cream or antihistamines where appropriate. PMLE-related rashes can last up to 1–2 weeks if untreated. Continuing to tan before the rash has resolved significantly extends recovery time.

Can I tan again after a tanning bed rash?

Wait until the rash has completely resolved before returning to a tanning bed. When you do return, start with a significantly shorter session than the one that caused the rash, and build back up gradually. If the rash recurs with a careful, shorter session, speak to a dermatologist before continuing — recurring reactions to UV may indicate PMLE or another condition that benefits from professional management.

Why do I always get a rash after a tanning bed?

Recurring rashes after every tanning session — particularly itchy, bumpy rashes on UV-exposed areas — are a strong indicator of polymorphic light eruption (PMLE). PMLE is an immune-mediated reaction to UV that’s common in fair-skinned people and new tanners. The skin can often build tolerance over gradual, incremental UV exposure, which reduces reactions over time. A dermatologist can confirm whether PMLE is the diagnosis and advise on a management approach.

Is a tanning bed rash the same as a tanning bed burn?

They’re related but different. A burn from a tanning bed is a UV injury to the skin that produces redness, pain, and in severe cases, blistering — similar to a sunburn. A rash is typically more itchy than painful, presents as bumps or raised patches, and may be caused by several different mechanisms including UV reaction, heat, contact with products, or an immune response. The two can occur together, and both require stopping tanning until the skin fully heals. For burns specifically, see our guide on tanning bed burn relief.

Can tanning bed rashes be prevented entirely?

Not guaranteed, but the risk can be reduced significantly. Gradual session building, consistent moisturizing, wiping down the bed before use, reviewing your medications and products, and choosing a clean salon with good hygiene standards address most of the common causes. People with PMLE will find that gradual UV exposure over time often reduces their reactivity — a process sometimes called UV hardening — though this should be done carefully and with medical guidance if reactions are severe.

Conclusion

Tanning bed rashes are a genuine and common issue, but understanding their causes makes them far more manageable. The majority are caused by UV overexposure or PMLE — both of which respond well to building session time gradually and giving the skin adequate recovery time between sessions. Contact-related rashes from the bed surface or tanning products are almost entirely preventable with good hygiene practices and careful product selection.

If a rash develops, stop tanning, cool the skin with lukewarm water, and use an OTC hydrocortisone cream and antihistamine where appropriate. Most cases resolve within a week. If the rash is blistering, spreading, accompanied by fever, or doesn’t improve within 5–7 days, see a doctor rather than continuing to manage it at home.

The goal is a tan that looks great without the skin paying an unreasonable price for it — and with the right approach to session timing, hygiene, and preparation, most people can use tanning beds comfortably and rash-free.

References

Bacterial and Chemical Contamination of Tanning Beds:
Brooks, G. F., et al. (2010). Journal of the American Academy of Dermatology. “Bacterial contamination of tanning beds.” Study identifying bacterial species on tanning bed surfaces at concentrations sufficient to cause skin and soft tissue infections, underlining the importance of cleaning the bed surface before each use.

Anti-Inflammatory Properties of Oatmeal (Avenanthramides):
Sur, R., et al. (2008). Journal of Drugs in Dermatology. “Avenanthramides, polyphenols from oats, exhibit anti-inflammatory and anti-itch activity.” Study demonstrating that avenanthramides — active compounds in colloidal oatmeal — inhibit inflammatory cytokines and histamine-driven itch responses, supporting their use as a topical treatment for skin inflammation and rash-related itching.