UV Trap: Why Even Indoor Workers Are At Risk Of Skin Cancer

Sitting in an air-conditioned office all day, working under bright fluorescent lights, and rarely stepping outside – surely that means you don’t have to worry about sunscreen, right? After all, skin cancer is something that happens to people who spend hours under the sun, not those stuck behind a desk. Unfortunately, that’s not quite true.

Even if you work indoors, your skin is still exposed to ultraviolet (UV) radiation, which is one of the leading causes of skin cancer. UV rays can penetrate through windows, bounce off reflective surfaces, and even be emitted by artificial lighting. Over time, this exposure accumulates, increasing the risk of skin damage and potentially leading to serious conditions like melanoma. Here’s what you need to know about the hidden risks and how to protect yourself.

How UV rays affect indoor workers

UV radiation comes in three forms: UVA, UVB, and UVC. While the Earth’s atmosphere largely absorbs UVC, UVA and UVB are the main causes of skin damage. Many people assume that being indoors shields them from these harmful rays, but that’s not entirely true.

1. UV penetration through windows

Most office buildings, homes, and vehicles have windows that allow natural light to enter. However, ordinary glass does not completely block UVA rays. While it does provide some protection against UVB, which is responsible for sunburns, UVA rays penetrate deeper into the skin, causing long-term damage such as premature ageing and an increased risk of skin cancer¹.

2. Reflection from surfaces

Even if you’re sitting away from a window, you’re not entirely safe. UV rays can reflect off surfaces like concrete, glass, and even desks, increasing indirect exposure. This means that even a well-shaded indoor environment doesn’t offer total protection.

3. Artificial light exposure

Fluorescent and LED lights, commonly used in office settings, emit small amounts of UV radiation. While exposure from these sources is significantly lower than from the sun, prolonged and continuous exposure over time² can contribute to cumulative skin damage.

The link between UV exposure and skin cancer

Skin cancer develops when UV radiation damages the DNA in skin cells, leading to uncontrolled cell growth. The three most common types of skin cancer are:

1. Basal cell carcinoma (BCC) – The most common and least aggressive form, often appearing as a waxy or pearly bump.

2. Squamous cell carcinoma (SCC) – A more serious type that can spread if left untreated, usually presenting as a scaly or crusty lesion.

3. Melanoma – The deadliest form of skin cancer, which can develop in existing moles or appear as new dark, irregular spots.

Even if you don’t spend much time outdoors, the cumulative effect of UV exposure through windows and artificial lighting can increase your risk. Studies have found that people who work near windows without UV protection or those frequently exposed to artificial light sources for long hours may have a higher likelihood of developing skin cancer³.

How to protect your skin indoors

The good news is that with simple precautions, you can significantly reduce your risk of UV-related skin damage.

1. Apply sunscreen daily

Sunscreen isn’t just for beach days. Dermatologists recommend applying a broad-spectrum sunscreen with at least SPF 30 to 50 every morning, even if you’re spending the day indoors. This is especially important if you sit near windows or work in a room with bright artificial lighting.

2. Use UV-protective window film

If your desk is by a window, consider adding a UV-protective film. These films can block up to 99% of UVA and UVB rays, reducing exposure while still allowing natural light in.

3. Wear protective clothing

Lightweight, long-sleeved clothing with a tight weave can provide an extra layer of protection. Some fabrics are even designed with built-in UV protection, making them ideal for those who work near windows.

4. Consider antioxidant skincare

Skincare products with antioxidants like vitamins C and E can help neutralise free radicals caused by UV exposure. Incorporating these into your morning routine may offer additional protection against long-term damage.

5. Take breaks away from direct light

If you have the option, try to sit away from direct sunlight streaming through windows. If moving your desk isn’t possible, use blinds or curtains to reduce exposure during peak sunlight hours.

Regular skin checks are crucial

Since the effects of UV exposure build up over time, it’s essential to monitor your skin for any changes. Check for new or changing moles, unusual spots, or persistent skin irritations. If you notice anything suspicious, seek medical advice immediately.

Early detection is key to effective treatment. There are several options for advanced skin cancer treatment in Singapore, including:

Wide excision
Mohs micrographic surgery
Cryotherapy
Topical therapies
Photodynamic therapy
Radiotherapy

If caught early, many forms of skin cancer can be successfully treated with minimal scarring and a high cure rate. Those who have undergone treatment should also take steps to prevent the recurrence of skin cancer by maintaining good sun protection habits.

Conclusion

Just because you work indoors doesn’t mean your skin is safe from UV damage. With exposure coming from windows, artificial lights, and reflective surfaces, indoor workers are still at risk of developing skin cancer. However, by taking simple precautions like applying sunscreen, using protective window films, and wearing UV-protective clothing, you can significantly lower your risk.

For those in need of expert dermatological care, Angeline Yong Dermatology offers a comprehensive range of cosmetic, surgical, and medical treatments in Singapore, including advanced skin cancer treatments. If you’re concerned about skin changes or want professional advice on protecting your skin, book a consultation today.

References

Does UV Radiation Cause Cancer?. American Cancer Society. (n.d.). https://www.cancer.org/cancer/risk-prevention/sun-and-uv/uv-radiation.html

Klein, R. S., Sayre, R. M., Dowdy, J. C., & Werth, V. P. (2009). The risk of ultraviolet radiation exposure from indoor lamps in lupus erythematosus. Autoimmunity reviews, 8(4), 320–324. https://doi.org/10.1016/j.autrev.2008.10.003

Health effects of artificial light. European Commission. (n.d.). https://ec.europa.eu/health/scientific_committees/opinions_layman/artificial-light/en/l-2/4-effects-health.htm

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UV Trap: Why Even Indoor Workers Are At Risk Of Skin Cancer