They simply become easier to see. As skin becomes thinner or loses firmness, the veins underneath may show more clearly. This can happen naturally with age, sun exposure, or changes in the tissue under the skin.
Sun exposure is especially relevant on the face, neck, and chest. The American Academy of Dermatology notes that spider veins can be associated with sunlight, hormonal changes, injury, age, pregnancy, and long periods of sitting or standing. Cleveland Clinic also lists spider veins, or broken capillaries, as a sign of photoaging on areas such
