My mom is having a funny thick saliva drying on her lip with a bitter taste. why could it be?

Evaluation needed: You mom should see a dentist who can evaluate her issues and suggest solutions, if necessary.

Clinical exam needed: Please call your local dentist for an evaluation and thorough diagnosis. They will need to take a dental and medical history , and examine her oral condition. The dentist will then offer a diagnosis & remedy for your mom's condition.