Dehydration is more serious than you might assume. When your body loses more fluids than it takes in, it can lead to various health concerns. It may cause mild discomfort, such as fatigue, headaches, and dry mouth, or, in more serious cases, life-threatening complications such as severe electrolyte imbalances, organ failure, and shock. So, you must drink adequate fluids to keep your body hydrated. Also, look beyond the usual signs of dehydration, as your body can send signals in unexpected ways. Remember: when in doubt, drink water.