What is thermavein thermavein is a machine which uses microwaves delivered through a needle the width of a hair although originally designed for the treatment of facial thread veins thermavein has several other uses what conditions can thermavein be used to treat thermavein can be used to treat facial thread veins melia small white dots usually on the face skin tags campbell de morgan spots red dots or bumps anywhere on the body blackheads ankle thread veins in combination w