I have the same poblem, its really weird and frankly i just find it disgusting. I went to the doctor but they just said everythings fine. Some of the other qwestions over google about bulging viens said things like, its means your hydrated, thin, or have more of a blood supply. Also if you have fair/thin skin if you place your arms down for example it pushes the veins a little upword but is easyier to see than people with normal skin. And if they are overheated, or if a blood supply is cut of somewhere like by a wrist band that can also contribute. If none of theese do it then consult your doctor.
Anxious people do have a tendency to fixate on parts of their body and notice and feel symptoms that are normal, Daniel. I doubt that there is anything wrong with your wrists and hands, but for your peace of mind get it checked out.
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