If you are seeing open sores on the gums I'd plan a vet visit.
This might be periodontal disease, a bactieral infection, a virus, or even a form of cancer so an in person vet exam to determine the right kind of treatment is the best option.
I'd suggest not waiting as if it is something that will require dental care or removal its best to do that as early as possible.
Hope this helps you!
Dog Expert:Rescue, Train,Breed,Care
30+ yrs dog home vet care & nursing, rescue, behavior&training, responsible show breeding, genetics