Telangiectasias (spider veins) are a common condition in the general population, especially among individuals with fair skin. In addition to genetic predisposition, the main causes leading to the development of telangiectasias include:

Fair skin
Chronic sun damage
Prolonged exposure to wind or heat
Long-term use of corticosteroid creams
Obesity
Hormonal factors
Thinning of the skin (atrophy)
Various skin diseases that cause vascular dilation
Genetic factors
Systemic diseases