Sores in the mouth do not necessarily spread rabies, rabies is mainly caused by animal bites or scratches with the virus.
Rabies is mainly caused by animal bites or scratches with viruses. If you are bitten or scratched by animals, you need to take rabies vaccine or rabies immunoglobulin to prevent rabies. There is no direct correlation between mouth sores and rabies, which may be caused by bacterial infections, fungal infections, herpes viruses infections, and will not transmit rabies.
If there are sores in the mouth, you can use medication to treat the symptoms, such as the use of rehabilitation of new liquid and so on. Rest and a proper diet should also be observed.
For rabies, if there is a history of exposure, such as being scratched or bitten by an animal such as a cat or dog, rabies vaccination is needed to prevent it, and rabies virus immune globulin is needed for exposures of grade 3 or higher.