Does a sinus infection give you dry mouth?

Sinus infections can indeed cause dry mouth as one of their symptoms. When the sinuses become inflamed or infected, they can produce excess mucus, leading to nasal congestion and difficulty breathing through the nose. This forces individuals to breathe through their mouths more frequently, resulting in dryness of the mouth and throat. Additionally, some medications used to treat sinus infections, such as decongestants, may also contribute to dry mouth as a side effect.