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Berlin, May 14, 2025 – As the warm days begin, people are drawn outdoors. But the joy of sunshine and rising temperatures also hides dangers: In Germany, the number of hospital admissions due to skin cancer has increased dramatically over the past 20 years. A crucial protective factor is overlooked by most people – the UV index shown in weather apps.
Skin Cancer Cases Are Rising Rapidly
According to the German Federal Statistical Office, around 116,900 people were hospitalized for skin cancer in 2023, which is about 88 percent more than in 2003. Especially cases of “light” skin cancer have increased: compared to 2003, these have more than doubled. Cases of dangerous black skin cancer (melanoma) have also risen sharply.
Experts attribute this development mainly to an aging population, as skin cancer is more common in older people. However, young people are also affected – often due to sun damage that occurred decades ago. In the 1970s and 80s, people paid little attention to sun protection, and sunscreens at that time were less effective than today’s products.
UV Rays: An Invisible Danger for Skin and Eyes
The main cause of almost all skin cancer cases is ultraviolet (UV) radiation from the sun. It is neither visible nor tangible, but even small amounts can cause long-term damage. Protection is important even on cool, clear days, as low temperatures do not mean low UV exposure.
The Federal Office for Radiation Protection (BfS) recommends paying attention to the UV index. Many weather apps display this value on a scale from 1 to 11+. As soon as this value reaches 3 or above, it is important to use sunscreen, sunglasses, hats, and long-sleeved clothing. Especially around midday, this value can rise quickly even in spring.
Sunscreen: Protection and Myths
Sunscreens contain chemical and mineral filters that absorb or reflect UV rays. Modern sunscreens provide reliable protection when applied correctly and in sufficient quantity. Some people worry that sunscreens themselves may be harmful to health, but according to the German Risk Assessment Institute, there is no evidence of health risks from UV filters in products approved in the European Union.
However, some ingredients such as nanoparticles or chemical filters can be harmful to aquatic organisms. Researchers advise using environmentally friendly sunscreens when swimming in lakes or the sea.
Eye Protection Is Also Important
UV rays can damage not only the skin but also the eyes. The World Health Organization (WHO) recommends wearing sunglasses with UV-400 or CE marking when the UV index is 3 or above. Simply having dark lenses does not provide protection – real protection comes from the UV filter.
UV Exposure Is Increasing – Climate Change as a Cause
Studies have shown that UV radiation in Central Europe has increased significantly in recent decades. The main reasons are less cloud cover and more sunshine, both consequences of climate change. The number of sunshine hours has increased by about 10 percent since 1951.
With rising temperatures, people spend more time outdoors and wear lighter clothing – further increasing the risk of skin damage.
Conclusion: Checking the UV index in weather apps is an easy and effective way to protect against skin cancer. Those who regularly monitor this value and take protective measures can significantly reduce the risk of damage to skin and eyes.
Disclaimer:
This article is for general information only and does not replace medical advice. For more information about skin health, sunscreen, or individual risks, please consult your doctor or a dermatologist. The recommendations given here are based on current scientific research and official bodies such as the Federal Office for Radiation Protection and the German Risk Assessment Institute.
