Certain autoimmune disorders, such as Sjögren’s syndrome, can attack the glands that produce saliva and tears, leading to chronic dry mouth and dry eyes.
The Bottom Line
Nighttime dry mouth can have many possible causes, ranging from simple dehydration to more complex medical conditions. If it happens occasionally, improving hydration and sleep habits may help. However, if it is frequent or persistent, it’s important to consult a healthcare professional for proper evaluation.
Your body often sends subtle signals—paying attention to them can help you catch potential health issues early.