Capillaries on legs with obvious purple color can be called capillary dilation, which may be caused by genetic factors, environmental factors, venous insufficiency of lower limbs, hormonal level changes and other factors. If it is caused by pathological factors, it is suggested that patients should undergo relevant examinations such as venous ultrasound examination and routine blood laboratory tests to clarify the causes and then treat the causes. 1, genetic factors: some people may have more obvious capillary growth in the legs, which can lead to purple-red capillaries on the legs, which is generally not an abnormal symptom; 2, environmental factors: such as living in the plateau area for a long time, thin air, skin Lack of oxygen or excessive ultraviolet radiation will cause the capillaries to expand, resulting in purple capillaries; 3, lower limb venous insufficiency: due to venous valve closure insufficiency, venous thrombosis or varicose veins, anger, if not dealt with in a timely manner, the blood will be stagnant in the calf vessels, resulting in increased pressure in the veins, vascular expansion and purple; 4, hormone level changes: some women Hormone level secretion reduction may lead to subcutaneous fat reduction, so that the leg subcutaneous capillaries look more obvious, can appear on the leg capillaries purple red obvious; 5, other cases: if there is abuse of cosmetics, long standing, excessive body obesity, etc., can also lead to the appearance of leg capillaries purple red performance. In general, capillary dilation can be treated without special treatment. If it affects the appearance, it can be treated by laser, sclerotherapy injection or surgery to remove the purplish capillaries according to the patient’s needs. If the color of the capillaries on the legs gradually becomes purple, you should go to the hospital in time for relevant examination to rule out whether it is caused by disease factors. Patients can usually strengthen lower limb exercises, such as jumping rope, running and other exercises, and if necessary, they can wear sequential decompression elastic stockings and try to avoid the behavior of standing for a long time to prevent or reduce such phenomenon.