Can Botox Cause Bulging Veins and Tight Skin?

Botox works to relax the muscles where it's injected...if you are noticing a vein or "tighter" skin, it absolutely could be a direct result of the Botox injection(s). The smoother the skin, the easier to see underlying vasculature.

The answers and advice given by others here is accurate and valid in my opinion.   When skin is smooth you can see underlying veins.  The veins can be treated but it may be a long course so be patient.  Smooth skin appears tighter.   So if you do not like this effect you simply do not get more Botox.   Although wildly popular, not all patients like Botox.   I have seen the vein appearance in a member of my own family that i was treating  for a very lined forehead.  She chose to ignore the vein and enjoy the great Botox effect.  Botox is wonderful, but it is not for everyone.  My Best,  Dr C

When the muscles don't move anymore, or as much, it can make the skin appear tighter. Most people actually like this affect because it creates a smoothness. Also, when the skin is tighter sometimes a more prominent vein will show up. The vein can be treated with sclerotherapy, most likely. But the Botox didn't cause the vein. The smoothness of the skin after Botox is just making it much more obvious.