What Causes Broken Capillaries After Laser Treatment?

This is a very difficult question to answer. I have 38 different laser and energy devices in my office so I have no idea what laser was used for your condition. In addition, each laser can be set with different energy levels as well as diameters, pre and/or post cooling and pulse durations. In general, a properly performed laser treatment should NOT make the problem worse or leave you with more blood vessels. I would advise seeing a laser surgeon who has more than one laser and enough experience to evaluate your problem .

There may not be a direct correlation between your new broken blood vessels or telangiectasia after laser treatments. Anything that makes you flush can create new telangiectasia, e.g. hot, spicy food, alcohol, caffeine, excessive sun exposure. Diode 532 nm laser or V beam should be effective to minimize broken blood vessels. IPL photofacial treatments are more helpful to reduce overall rosy complexion and sun spots.

There are many different lasers used for facial redness and without knowing your skin type and the laser and its settings used, it is impossible to answer your question.  It is extremely rare to develop more blood vessels after V-beam laser. If however, you developed an excessive reaction, blister, or scab after the laser, which is very, very rare, then as the body heals, the skin produces more blood vessels to help bring more oxygen to the area for a more speedy recovery. These vessels often fade. There are many variables that can be changed on the laser to try to give you a better result the next treatment.