The hidden dangers of indoor tanning

Indoor tanning may seem like a quick, controlled way to get a “healthy glow”, but the reality is very different. Sunbeds, tanning booths, and sunlamps expose your skin to intense ultraviolet (UV) radiation, often at levels as strong as – or stronger than – midday summer sun. This exposure can significantly increase your risk of skin cancer, including melanoma, the most serious type.

Understanding how indoor tanning affects the skin is the first step towards making safer choices.

What is indoor tanning?

Indoor tanning refers to the use of artificial devices that emit ultraviolet radiation to darken the skin. These devices typically use UVA or a combination of UVA and UVB light to stimulate the production of melanin, the pigment responsible for skin colour.

A tan is often seen as a sign of “good colour”, but medically it’s a sign of skin damage. UV radiation injures the DNA inside skin cells, and in response the skin produces more pigment (melanin), causing the skin to darken.

In other words, if you have a tan, your skin has already been harmed.

How does indoor tanning increase skin cancer risk?

Ultraviolet radiation can damage the genetic material inside skin cells. Over time, repeated exposure can cause mutations that allow abnormal cells to grow and divide without control, eventually forming skin cancers.

Indoor tanning has been strongly associated with several types of skin cancer, including melanoma, basal cell carcinoma and squamous cell carcinoma. Large studies show that using sunbeds before the age of 35 has been associated with around a 59% increase in melanoma risk compared with people who have never used them, and the risk increases further with more sessions over time. Melanoma is the most serious form and can spread to other parts of the body if not detected early.

Why are tanning beds considered especially risky?

Tanning devices can emit UV radiation levels that are significantly stronger than natural sunlight. Sessions are often repeated regularly, which increases cumulative exposure over time.

Several factors contribute to the risk associated with indoor tanning:

High levels of ultraviolet radiation, particularly UVA exposure
Frequent and repeated tanning sessions
Early age of first exposure, especially during teenage years
Cumulative lifetime UV exposure
False perception that a “base tan” offers protection against sunburn. In reality, any tan represents DNA damage and offers very little defence against the sun.

These factors can accelerate skin damage and increase the likelihood of developing skin cancer later in life.

Are there other effects of indoor tanning on the skin?

In addition to increasing skin cancer risk, indoor tanning can also lead to premature ageing of the skin.

Ultraviolet radiation breaks down collagen and elastin, the structural proteins that keep skin firm and bouncy.

As a result, people who regularly use tanning beds may develop:

Early wrinkles and fine lines
Uneven skin pigmentation
Thinning or fragile skin
Visible blood vessels

These changes may appear years earlier than would normally be expected with natural ageing.

How can skin cancer risk be reduced?

Reducing exposure to ultraviolet radiation is one of the most effective ways to protect the skin. Avoiding tanning beds is an important step in lowering the risk of skin cancer. Studies here in the UK suggest that banning indoor tanning, combined with public health campaigns, could prevent a substantial number of melanoma cases and deaths.

Additional protective measures include using broad-spectrum sunscreen, wearing protective clothing and avoiding excessive sun exposure during peak UV hours.

Regular self-skin checks are also important, particularly for individuals with a history of frequent UV exposure.

When should someone seek medical advice?

Any new or changing skin lesion should be assessed by a medical professional. Warning signs may include moles that change in size, shape or colour, lesions that bleed or do not heal, or persistent areas of skin irritation.

Early detection plays a key role in the successful treatment of skin cancer. By recognising the risks associated with indoor tanning and taking preventive measures, individuals can better protect their long-term skin health.