Max had something that looked like that quite often. Its a bacteria infection, that can open up into pimple like sores.. I had to wash his muzzle with soapy water every day until it cleared.. He started to get dry skn around the same time.. I bathed him every 2ed week & scrubbed his muzzle during bathes. I did that for YEARS & he never got those sores ever again.

Rocky the Rotti had the same issues, so we bathed him with Max & his went away too.

But the vet still knows best.