UV sensitivity refers to how susceptible an individual's skin is to the harmful effects of ultraviolet (UV) radiation from the sun or artificial sources. People with high UV sensitivity may experience sunburns, skin irritation, or other adverse reactions after minimal sun exposure. This sensitivity can vary based on skin type, genetics, and previous sun exposure. Certain conditions, such as lupus or xeroderma pigmentosum, can increase a person's UV sensitivity, making them more vulnerable to skin damage. Protective measures, like using sunscreen, wearing protective clothing, and seeking shade, are essential for those with heightened sensitivity to reduce the risk of skin damage and long-term health issues.