thirst

Thirst is the body's way of signaling that it needs more fluids. When you're dehydrated, your blood becomes more concentrated, prompting sensors in your brain (the hypothalamus) to trigger the feeling of thirst. This prompts you to drink fluids, helping restore the balance of water and electrolytes in your body. Thirst is an essential natural response that helps maintain hydration, supporting vital functions like circulation, temperature regulation, and nutrient transport. It typically occurs when your body's water levels drop or when you lose fluids through sweating, urination, or other means.