The capillaries on the legs like spider’s web are considered to be spider’s web type varicose veins, which are usually caused by heredity, obesity, trauma and other factors. Spider vein varicose veins occur in women, especially in pregnancy and obese women. When spider vein varicose veins occur, it is usually indicated by venous insufficiency of the lower limbs, where the veins of the lower limbs have valvular dysfunction that causes blood reflux, which leads to dilation of superficial capillaries, which is manifested as spider vein varicose veins. In the early stage of spider vein varicose veins, you can prevent the aggravation of varicose veins by wearing compression stockings and elevating the lower limbs to promote blood reflux. Spider veins can also be caused by other reasons and should be treated under the guidance of a doctor.