Disturbed blood flow from the capillaries causes a dark-red to blue discolouration on the thighs and lower legs. These star-shaped and network patterns are sometimes confused with varicose veins. These capillaries can be destroyed with laser therapy while the skin surface is protected by a cooling system. This treatment is an alternative or a complement to the classic treatment which is by injection. It is very important not to tan for several weeks before and up to two months after the treatment.