Hidden Signs of Dehydration That Aren't Just Thirst

59. A Flaring of Allergies

Dehydration can make you feel more sensitive to allergens, leading to an increase in symptoms like sneezing, nasal congestion, or a dry, scratchy throat. When your body is low on fluids, the mucous membranes that line your nose and throat can dry out and lose their ability to trap airborne irritants like pollen and dust. This makes it easier for allergens to enter your system and trigger an inflammatory response. Staying hydrated helps keep these membranes moist and effective, acting as a natural defense against seasonal allergies and environmental irritants.

60. Sudden Onset of Anxiety

Beyond general mood swings, a subtle but significant sign of dehydration can be a noticeable increase in anxiety. Your brain relies on a delicate balance of hormones and neurotransmitters, and even a small fluid imbalance can disrupt this. Dehydration can increase cortisol (the stress hormone) and decrease serotonin, leading to a heightened state of anxiety. If you feel more on edge or have a racing mind for no clear reason, try a glass of water. It's a simple, foundational step to help your nervous system regulate itself and restore a sense of calm.