If you see your Papillon, or Phalene all of a sudden drool more than he normally does, expect that there is something wrong with him; even though it could be a minor problem.
The best thing to do is to consult your vet.
Your Papillon:
- Could have an injury to his gums.
 - Could have a tooth infection.
 - He might have an object stuck between his teeth, or throat.
 - He could have a digestive problem, a stomach upset, or poisoning.
 - Allergic reactions, or a insect sting.