In fact, many studies have demonstrated a decrease in salivary secretion in heavy drinkers. Not having enough saliva causes a condition known as dry mouth (also known as xerostomia). That's why many people report experiencing dry mouth after drinking alcohol. The same study also notes that alcohol acts as a diuretic.

Why does alcohol give me cottonmouth?

Dry mouth, after drinking a significant amount of alcohol, is a result of the redistribution of fluids in the body. It is a sign that the person is dehydrated and signals the person to drink water or other fluids that will replenish the body.

Does alcohol make your tongue dry?

Consumption of alcohol can result in a very dry and sticky mouth and tongue.