Nantong Sixth People's Hospital recently treated a woman who developed redness and intense itching after adopting extreme sun protection, according to SCMP on 22/6. The patient applied a thick layer of sunscreen, wore a hat, and a mask that covered her entire face from head to chin. By the end of the day, she experienced a burning sensation and facial redness. The next morning, her entire face was covered in a severe rash and intense itching.

Doctors diagnosed this as a typical skin irritation resulting from prolonged, full-face covering. When the face is sealed in a hot, humid environment for extended periods, the skin enters a state of "suffocation," unable to excrete sweat and breathe naturally, which leads to inflammation.

Covering the face tightly in hot weather creates a closed "microenvironment" where heat and humidity accumulate directly on the skin's surface. Sweat and sebum cannot evaporate, leading to widespread blockage of pores and hair follicles. This condition impairs the skin's natural protective barrier, triggering an inflammatory response characterized by erythema, itchy papules, and a stinging sensation—commonly known as occlusion dermatitis.

A woman wearing sun protection gear rides a motorbike in hot weather in Chengdu, Sichuan province, China. Photo: CFP

The patient's error was exacerbated by applying sunscreen too thickly under the mask. Sunscreens often contain film-forming agents, emulsifiers, and water-resistant ingredients. In a hot, humid environment, these components can intensify the feeling of stuffiness and accelerate blockage, leading to a more severe outbreak of dermatitis.

The trend of "full coverage" sun protection is increasingly popular. On e-commerce platforms, hats integrated with masks that only leave the eyes exposed are among the best-selling products. These items are often advertised as "comprehensive" sun protection solutions, using cooling fabrics or adding skin-nourishing ingredients like hyaluronic acid to increase their appeal.

These full-face masks are known as facekinis, an accessory that became a social media sensation about a decade ago, often seen on Chinese beaches. The demand for these items is significant. In 2024, a wholesaler at Yiwu market reported selling over 40,000 units in a single day.

According to iiMedia Research, the market size for sun protection apparel in China reached 67,5 billion yuan (9,9 billion USD) in 2022 and is projected to hit 95,8 billion yuan this year.

However, doctors warn that covering the face completely is an excessive protective measure. Not only does this increase the risk of allergies and dermatitis, but this habit can also limit the body's exposure to sunlight, which is essential for synthesizing vitamin D.

Doctors advise prioritizing breathable sun protection methods such as wearing wide-brimmed hats, using umbrellas, or breathable masks. They also recommend limiting outdoor activities during peak sun hours, from 10 a.m. to 4 p.m.

Binh Minh (According to SCMP, Sina)