Why is my shih tzu's bottom of his mouth red?

A red bottom of your Shih Tzu's mouth could indicate several issues, including irritation, Allergies, or inflammation. It may be a sign of dental problems, oral infections, or even a reaction to food or treats. It’s important to monitor for additional symptoms like swelling, drooling, or difficulty eating. If the redness persists or worsens, consult your veterinarian for a proper diagnosis and treatment.