Fine Red Veins More Prominent After V Beam Laser?

Can very fine, thread-like red veins look worse one day after a Vbeam treatment? I thought that they were eradicated instantly, as has been my past experience with Vbeam treatments. I'm not talking about swelling or purpuric bruising. The actual veins that were lasered look more defined/redder a day after. I also asked for a purpuric setting, but the nurse performing the treatment said she couldn't get my skin to bruise. It would only momentarily turn purple and then quickly return to normal.