Sun and UV radiation

The sun is the main source of natural ultraviolet radiation (UV radiation). Although natural or artificial UV rays cannot be seen or felt, they have an effect on the human body. UV rays are important for the formation of vitamin D in our bodies, but at certain intensities they can damage the skin and eyes.

Rules of conduct for sun protection

Protect yourself from the sun: by following a few simple rules, you can significantly reduce the risk of skin damage.

Avoid direct sunlight

The sun is strongest between 11 a.m. and 3 p.m. During this time, it is best to stay in the shade or indoors. If this is not possible, the following two tips will help:

Do not use a solarium

If you still wish to use a solarium, follow the recommendations of the FOPH and note which people should avoid using solariums: Solarium

Check your skin

Keep an eye out for any changes in your skin and show them to a professional. Not all skin changes go away on their own, and some can be signs of a serious illness. So, make sure to get them checked out by a dermatologist. Ideally, you should get a skin check-up every one to two years, especially if there are cases of skin cancer in your family.

When do I need to protect myself particularly well?

  • under cloudy skies
  • iat the height
  • close to the equator
  • near snow, water or sand (reflections)

Fact sheet: Sunglasses

UV rays can cause irreversible eye damage, especially in children. Wearing appropriate, well-fitting, certified sunglasses with 100% UV protection is therefore essential in everyday life – even in the shade or on cloudy days. Protect your eyes effectively and over the long term.

Further Information

Federal Office of Public Health FOPH

Radiological Protection Division
Non-ionising Radiation and Dosimetry Section
Schwarzenburgstrasse 157
Switzerland - 3003 Bern