My dog won’t stop licking himself!

Okay so recently he started licking in just one spot, he’s 3 years old and never done this before but now he’s irritating his skin, or maybe it’s something else? I want to take him to the vet but he gets anxious around other animals and sometimes territorial to other dogs so I’m scared to bring him in... has anybody else experienced this with there dog? I try to stop him from licking and I even wake up at night time because I can hear him but nothing seems to work, I tried wrapping it but he tears it off the moment he can.

Here’s the damage he’s done!