The right thing to do: in this case, and only this case (no need to go thirsty during a heatwave!), reduce the amount of water you drink. "A second possible cause is sleep apnea," he explains. "This condition causes the body to secrete a hormone at night that makes the kidneys work harder – and therefore eliminate the water consumed during the day."
The right thing to do: consult your doctor, who will take the appropriate measures.
A final possible cause: a form of heart failure. The heart struggles to pump blood back up, which stagnates in the legs, resulting in a feeling of heavy legs during the day… “In this case, at night, once you are lying down, the blood flows back up more easily, and the kidneys do their filtering job, which they were unable to do during the day – and, as a result, you get up to urinate!” explains Professor Desgrandchamps.
The right approach: a simple solution is to take 20 to 40 minutes at the end of the day to lie down with your feet elevated, or even raised against the wall. And you can go to the bathroom before going to sleep!
Finally, if your doctor has prescribed diuretics, remember to take them in the morning, and in any case never after 6 p.m.
