Autoimmune diseases: less frequent, but relevant
In some autoimmune diseases, such as Sjögren’s syndrome, the immune system itself attacks the salivary glands, drastically reducing saliva production. In these cases, the dryness is usually intense, constant, and difficult to relieve.
It is usually accompanied by other symptoms such as dry eyes, extreme fatigue, joint pain or inflammation of salivary glands. Although it is not a common cause, it is important to consider it if dry mouth is severe and persistent.
Breathing through the mouth during the night
Sleeping with your mouth open, which is common in people with nasal congestion, rhinitis, sinusitis, snoring or sleep apnea, promotes the evaporation of saliva during the night. This explains why many people wake up with an extremely dry mouth and an irritated throat.
In addition to being uncomfortable, this habit increases the risk of cavities, infections, gum inflammation, and bad breath.
