The cardiovascular system requires testosterone, when I lost my optimal testosterone my veins disappeared beneath my skin, they have been popping out recently.
Nitric oxide is better on TRT and that could also be a factor. Gene’s Notric Oxide Stack really brings out the vascularity. I use a variation and at age 64 have never been more vascular. Give it a try.
I've had the same thing since I started trt in February. Im assuming your fairly lean too.
I've kind of got used to it now. I searched a lot for the reasons behind it. Best I heard is the increased Nitric oxide.