8 Possible Reasons Your Mouth Feels Dry at Night

Waking up with a dry mouth can affect your overall health and may signal an underlying problem. Here are eight possible causes:

1. Digestive Issues – Late-night greasy, spicy, or salty foods can irritate your stomach and pull fluids from your body, leaving your mouth dry.

2. Liver Problems – An overworked liver may cause toxin buildup, which can show up as persistent dry mouth.

3. Dehydration – Not drinking enough water during the day leads to fluid loss overnight.

4. Oral Health Issues – Gum disease, cavities, or bacterial buildup can cause dryness and inflammation.

5. Diabetes – High blood sugar increases fluid loss through urine, making your mouth dry at night.

6. Bile Reflux – When bile backs up into the stomach, it can cause dryness and digestive discomfort.

7. Fever – Elevated body temperature speeds up fluid loss, leading to dryness and a burning sensation.

8. Hyperthyroidism – An overactive thyroid increases metabolism and water needs, causing dry mouth even during sleep.

Tips: Stay hydrated, maintain good oral hygiene, monitor your diet, and consult a doctor if the problem persists — it could be a sign of a health condition that needs attention.