Dehydration occurs when more water and fluids leave the body than enter it. Symptoms of dehydration can include darker urine, headaches, lethargy, dizziness, and constipation. The human body is ...

Your body regularly loses water through sweating and urination. If you don’t replace it quickly enough, you get dehydrated. People at risk include athletes, those who work in the heat, older adults, ...

A dehydration headache describes a type of headache that a person may experience when the body loses too much fluid and electrolytes. Replenishing fluids can often treat a dehydration headache. There ...