Visible capillaries on the legs are a sign of capillary dilation, which is a pathological change. The most common cause is varicose veins in the lower extremities, which are the mildest type of varicose veins in the lower extremities. This is due to the weakened elasticity of blood vessel walls, valve insufficiency, blood reflux, and stagnation of refluxed blood in the lower extremities due to prolonged standing or sitting, as well as heavy physical labor, pregnant women, and obese people, causing the veins of the lower extremities to become tortuous and dilated. When the venous pressure increases, the capillaries naturally appear to be dilated. When capillary dilation occurs, you can improve your daily work and living habits and avoid standing or sitting for long periods of time. Elevate your feet at rest to promote venous return. You can promote venous return by taking oral medication or wearing varicose veins stockings to improve tissue edema and promote microcirculation. If there are capillary protrusions, they can be treated by subcutaneous electrocoagulation or foam sclerotherapy.