Sun exposure refers to the amount of time a person spends in direct sunlight. The sun emits ultraviolet (UV) rays, which can have both positive and negative effects on health. Moderate sun exposure helps the body produce vitamin D, essential for bone health and immune function. However, excessive exposure can lead to skin damage, sunburn, and an increased risk of skin cancer. To protect against harmful effects, it is important to use sunscreen, wear protective clothing, and seek shade during peak sunlight hours. The World Health Organization recommends limiting sun exposure, especially for vulnerable groups like children and those with fair skin.