Even though the term "varicose" can mean simply 'large' or 'swollen' (don't get overly excited) ~ most folks in the medical community associate varicose veins with the twisty, dark blue, non-flowing veins that signify a more dangerous (possibly?) health situation. Stagnant blood flow is usually associated with the varicose veins you see in..... Walmart?
The veins of a bodybuilder like that will definitely come with extremely low bodyfat levels, but the high blood pressure is definitely a good portion of what it takes to look like that.
1) yeah, he could have held a tourniquet over his arm
2) he could have just finished pumping the crap out of that arm
3) I doubt ANY bodybuilder wakes up in the morning looking like that before a meal and/or a workout