Substantial increase in Penile/testicle veins

When I got an ultrasound of my balls, my urologist found I had a varicocele. I already knew this and I also noticed I had tons of new veins in my penis and balls, but wasn’t sure if this symptom was shared with any other PFS/PAS/PSSD ers. Why does this happen anyway?

After isotretinoin I have a lot of visible veins in places people normally don’t. I guess it’s just thinning of the skin.