Dry mouth is when the salivary glands don’t make enough saliva, which helps prevent tooth decay, limits bacterial growth, improves digestion, and cleans the mouth. It is a common side effect of certain medications, but very commonly, it is one of the first signs of dehydration. Drinking water often will help keep the mouth moist.
If you wake up in the middle of the night with no apparent reason, you may need to drink some water. Even mild dehydration dries out the mouth and nasal passages, which can lead to snoring and hoarseness in the morning, according to the National Sleep Foundation. It’s common to lose fluid during sleep by simply breathing, especially if you breathe through the mouth.
Dark yellow urine
The general rule of thumb is that the lighter the color of your urine, the more hydrated you are. The darker it is, the more dehydrated you are, provided you are not on any medications and are in good general health. This is because fluids dilute the yellow pigments in urine. So if you don’t drink enough water, the yellow color will be more concentrated.