Drinking too much at once
Going hours without water and then drinking a large amount all at once can overwhelm the kidneys and the heart. After 60, the body is less efficient at handling sudden fluid loads. This can lead to swelling in the legs, strain on the heart, and dilution of sodium levels in the blood, which may cause confusion or weakness.
It is far safer to drink small amounts regularly. A glass at a time, taken slowly, allows the body to process fluids without stress.
Drinking right before bed
Hydrating late at night often leads to disrupted sleep because of frequent trips to the bathroom. As we age, the hormone that reduces nighttime urination becomes less effective. Getting up repeatedly increases the risk of dizziness and falls, which can have serious consequences.
Ideally, fluids should be reduced at least two hours before bedtime. If the mouth feels dry, a small sip or simply moistening the lips is usually enough.
Waiting until you feel thirsty
Thirst becomes a less reliable signal with age. By the time thirst appears, mild dehydration may already be present. Thicker blood increases blood pressure, makes the heart work harder, and raises the risk of clots.