Fluid imbalance occurs when the amount of fluid in the body is not in the proper balance. This can happen when there is too much fluid (overhydration) or too little fluid (dehydration). Both conditions can disrupt normal bodily functions and may lead to serious health issues. Common causes include excessive sweating, vomiting, diarrhea, or certain medical conditions. Symptoms of fluid imbalance can vary but often include thirst, dry mouth, fatigue, and changes in urine output. Maintaining proper hydration is essential for overall health, and it is important to monitor fluid intake, especially during illness or intense physical activity.