Reticular veins are those deeper, darker veins that form bluish networks that crisscross the thighs and lower legs. They are most often noticed in the outer thigh, 
extending into the backs of the thighs and the knees. They typically measure 1-3mm in diameter.
Reticular veins are larger than spider veins and are usually the source of spider veins. When a reticular vein is the source of spider veins, we call these reticular veins ‘feeder veins’. Treating reticular veins will help eliminate spider veins. Reticular veins are often accompanied by significant symptoms of local tenderness or burning and itching, that also improves with treatment.
