Ok, so what can you do about thread veins? They're so small, yet these tiny little over-stretched capillaries show up all too clearly on the skin, particularly as they tend to gather in clusters. Skincare isn't going to have any noticeable effect on thread veins, however much 'strengthening of the capillary walls' that it promises. Tweakments, though, can do the job.
You're looking at IPL or laser which are both effective if a bit nippy, as treatments go. These will actually get rid of your thread veins and they won't come back - but if you've started developing them, you may well go on to develop more. You can find out more about thread veins in this free downloadable fact sheet.