How does the eterna ipl work on thread veins and rosacea the process is non invasive no needles by sending very short pulses of light into the skin it destroy the vein using heat the veins shrink over the following weeks and are re absorbed by the body facial problems such as permanent red flushing broken thread veins and red spots have proved most successful skin may be slightly red after treatment however this dissappears within a few hours to a day a course of 1 to 5 sessions i