The laser is a beam of light of a single color. The cells that have that color absorb the luminous energy, warm up, and end up being destroyed by this heating. This destruction does not affect the surrounding tissues. Varicose veins heat up the red blood cells and, by transmitting this heat to the endothelium, and cause it to sclerose. Various forms of laser application can be differentiated:
- Surface Laser: It is applied from the outside, through the skin and mainly treats varicose veins, spider veins, and small superficial veins.
- Endolaser or internal laser: A thin optical fiber is inserted into the vein, closing the affected vein during its travel. It does not allow its use in excessively tortuous veins and some other cases.