A dermatologist warns about the effects of blue light on the epidermis.
- Exposure to blue light can increase skin pigmentation, especially in people with darker skin.
- It can also cause wrinkles and disrupt sleep, which can worsen existing skin problems, such as acne, eczema and rosacea.
- To reduce its harmful effects on the skin, it is advisable to keep your phone away from your skin and use sunscreen.
Computer, tablet, phone, television… When we use these devices, we are exposed to blue light. While this can cause eye fatigue, blurred vision or headaches, it can also be dangerous for the skin. In a publication by The ConversationMichael Freeman, professor of dermatology at Bond University (Australia), reviewed several studies highlighting the harmful effects of blue light on the epidermis.
Blue light can cause wrinkles and increase skin pigmentation
According to a studyanalyzed by the researcher and published in July 2023, exposure to blue light can increase skin pigmentation. In detail, it can stimulate the production of melanin, a natural pigment that gives skin its color, and potentially worsen hyperpigmentation (i.e. the overproduction of melanin leading to brown spots on the skin), particularly in people with dark skin. Other work suggests that blue light could damage collagen, a protein essential to the structure of the skin, and potentially accelerate the formation of wrinkles.
Acne, eczema, rosacea: lack of sleep can make these skin problems worse
Among the cohorts examined by Michael Freeman, some studies also highlight the fact that blue light disrupts sleep. “It is particularly effective at suppressing the production of melatonin. This natural hormone normally signals our bodies that it is time to sleep and helps regulate our sleep-wake cycle. By suppressing melatonin, exposure to blue light before bed disrupts this natural process, making it harder to fall asleep and potentially reducing the quality of your sleep.”
Problem: Poor sleep can worsen existing skin conditions, such as acne, eczema, and rosacea. Not getting enough sleep can also increase levels of cortisol, a stress hormone that breaks down collagen, the protein responsible for skin firmness, and weaken the skin’s natural barrier, making it more vulnerable to environmental damage and dryness.
Blue light: how to limit your exposure?
To minimize exposure to blue light and reduce its harmful effects on skin and sleep, the dermatologist advises activating the “night” mode on devices in the evening. He also recommends reducing screen time before bed and establishing a relaxing routine to promote sleep. “Keep your phone or device away from your skin to minimize exposure to blue light, and use sunscreen. Mineral and physical sunscreens containing titanium dioxide and iron oxides provide broad protection, including against blue light.”