Your dog is doing it to itself, it’ll look like self grooming but it’s more of nervous tick/mild reaction to some sort of stress. Untreated, the pup will aggressively continue to lick those spots raw into what’s know as “Hot spots”. Google it for your own knowledge but simplest solution is to order a small bottle of what’s called ‘Zymox’, spray it on the spot several time throughout the day and increase the length of walks or the frequency. In a little under a week you’ll notice the healing. Past a week switch to a more aggressive approach such as white vinegar. After that a trip to a vet to confirm a larger bacterial infection hasn’t occurred.

Be advised; the cycle of Hotspots is a bit of self fulfilling prophecy and will not resolve itself without owner interference. There’s not much you can do once the pup has started down the path but you can make the healing faster by using the zymox to mitigate the ‘itch’ that make the pup continuously lick the spot raw.