Too Much Sun is Dangerous Sunlight, an essential prerequisite for life, may be extremely dangerous to human health. Excessive exposure to the sun is known to be associated with increased risks of various skin cancers, cataracts and other eye diseases, as well as accelerated skin ageing. It may also adversely affect people's ability to resist infectious diseases, and compromise the effectiveness of vaccination programmes.
Sunlight is electromagnetic energy, which is propagated by electromagnetic waves.
Excessive exposures to them poses particular risks to health. Excessive UV exposure results in a number of chronic skin changes. Photoageing makes people look older because their skin loses its tightness and so sags or wrinkles. Caucasians have a higher risk of skin cancer because of the relative lack of skin pigmentation. The worldwide incidence of malignant melanoma continues to increase, and is strongly related to frequency of recreational exposure to the sun and to history of sunburn.