The sun is a source of energy and enables life on Earth. During life, people are constantly exposed to sun radiation. There are three basic types of sun ultraviolet radiation (UV). The most dangerous UVC rays are completely absorbed by the ozone layer, UVA and UVB rays reach the ground and thus all of us. UV radiation has different impacts on our skin, and it depends on the length and intensity of UV rays. The aim of this research work was to examine the knowledge and behavior of participants for excessive exposure to sunlight and to what extent participants use preventative measures to reduce the harmful effects of sunbathing. The survey consists of fifteen questions. Several questions were related to the general information of the participants, the lifestyle, how much knowledge they have about the damaging consequences of excessive sun exposure, which is their most important source of information, the frequency of going to the dermatologist for preventative skin tests and self-examination of the skin, and how much they use preventative measures of protection. The survey was conducted over the Internet, involving 170 participants. The results of the survey should point to the knowledge, consequences and use of prevention measures of participants in excessive exposure to sunlight. The results obtained show that participants are generally well or well aware of the damaging consequences of excessive exposure to sunlight. To the largest number of participants Internet is the most important source of information about the harmful consequences of excessive exposure to sunlight. The results indicate that participants consider burns as the most common consequence of overexposure to sunlight, while melanoma is the second most common cause. Only 32 (18.8%) participants go to the dermatologist for preventive examinations, while 111 (65.3%) of them do self-examination on the skin once a month or once a year. In order to protect our skin and prevent the formation of skin melanoma, education is required. Nurses and health workers should be involved in educating on preventative skin protection measures and raising awareness of the consequences of overexposure to sunlight.