Are you drinking enough water? With everything else going on in your life, it can be easy to forget how many glasses you've had. The NHS recommends six to eight glasses of water a day to maintain hydration, concentration and overall health. So how do you know if you're at a healthy level of hydration? A simple skin test you can do anywhere! The test relies on "skin turgor," which is your skin's elasticity. You can test your skin turgor if you pinch the skin on the back of your hand for a few seconds. If it immediately returns to normal, you are hydrated enough. If it doesn't, you need to drink more water.