What Does a Sour Taste in the Mouth Upon Waking Mean?
1. Introduction A sour taste in the mouth upon waking typically indicates the retrograde flow of stomach acid into the oral cavity during sleep, a classic presentation of silent gastroesophageal reflux disease. Additionally, significantly reduced overnight salivary flow creates a stagnant environment where anaerobic bacteria ferment trapped food particles, producing acidic, foul-tasting metabolic byproducts. This … Read more