Hidden Signs of Dehydration That Aren't Just Thirst

29. A Weakened Immune System

Dehydration can leave your immune system compromised, making you more susceptible to illness. Your body's first line of defense against pathogens is a healthy mucous membrane in your nose and throat. When you're dehydrated, these membranes dry out and crack, losing their ability to trap airborne germs and viruses. This allows pathogens to enter your system more easily. Furthermore, immune cells and antibodies rely on fluid to circulate effectively. By staying well-hydrated, you ensure your immune system is operating at full strength, protecting you from seasonal colds and other infections.

30. Difficulty Swallowing

A persistent feeling of a dry mouth or difficulty swallowing can be an early sign of dehydration. This happens because your salivary glands need water to produce saliva, which lubricates your throat and aids in swallowing. When your body is in a state of fluid conservation, saliva production decreases, and the mucous membranes in your throat become dry and sticky. This can make swallowing food feel uncomfortable or even painful. Ignoring this signal could lead to a chronic dry mouth, which increases the risk of oral infections. Listening to this cue can prevent discomfort and maintain good oral health.