There are many purple blood vessels found on the thighs, this is because there are capillary dilation on the thighs, which is a type of varicose veins. It only affects the patient’s aesthetic appearance and does not cause other symptoms, such as soreness and swelling of the legs, eczema, ulcers, rupture and bleeding. If the patient feels that it affects the aesthetics of the leg and cannot accept these purple blood vessels, a minimally invasive foam sclerotherapy injection can be performed to close the purple blood vessels, which can eliminate the diseased blood vessels.