For most people, dehydration is the much greater issue. However, if you suspect you may be overhydrated, look for symptoms like cloudy thinking, nausea and vomiting, muscle weakness, spasms or cramps and headaches. In severe cases symptoms could include mental confusion, seizures, unconsciousness and even coma.

How much is too much water in a day?

Water needs vary based on numerous factors. As drinking too much water can disrupt your body’s electrolyte balance and lead to hyponatremia, 3 liters (100 ounces) may be too much for some people.

How long does it take to get over overhydration?

Drinking less than a quart of fluids a day usually results in improvement over several days. If overhydration occurs with excess blood volume because of heart, liver, or kidney disease, restricting the intake of sodium is also helpful because sodium causes the body to retain water.