 [ Symptoms ] i get a salty taste in my mouth after i brush and rinse what causes this [ Disease ] a salty taste in your mouth could result from a gum or decay problem or it could be a byproduct of a mouth rinse or toothpaste sinus problems leaky crowns and fillings and certain metabolic health issues can also be a factor causing the salty taste to develop get an examination from a dentist you may also need a referral to see a doctor who is an ear nose and throat specialist