I got a handjob from a girl with herpes. My anus itches and was wondering if I could have got herpes from a handjob or could it be from something else?

Slow Down. Anus itching is not in any way a symptom of herpes. First, congratulation on having a sexual encounter. Second, what is the real problem here? Getting a hand job does not in any way put your anus at risk for anything. Why would you even spend a second trying to connect the two?