If u have excessive saliva, chapped lips.and dryness.of.mouth shouldn't be there.
Get a thorough check by your dentist. He might call a oral medicine dentist for further follow up.
Check with physician too as if you have sinusitis persistent tonsils, acid reflux, it can affect swallowing.
Next Steps
visit your nearby dentist.he will suggest you necessary tests and detailed case history is needed.