Diathermy is a comfortable and effective treatment for the reduction of thread veins. This versatile method can treat a variety of skin blemishes, from skin tags and age spots, to facial thread veins, warts and milia, as well as vascular conditions such as rosacea. A tiny, sterile needle is carefully inserted into, or beside, the area that is being treated. A very small current of energy is passed into this part of the skin. This ‘dries up’ the vessels leading to a visible reduction in the appearance of the blemish.