Excessive sun exposure occurs when the skin is exposed to the sun's ultraviolet (UV) rays for prolonged periods without adequate protection. This can lead to various skin issues, including sunburn, premature aging, and an increased risk of skin cancer. The intensity of UV rays can vary based on factors like time of day, geographic location, and weather conditions. To protect against excessive sun exposure, it is important to use sunscreen with a high SPF, wear protective clothing, and seek shade during peak sunlight hours. Regular skin checks can help identify any unusual changes, which may indicate skin damage or conditions like melanoma.