Remember those mornings when you were sure you had slept well, and you knew that you had slept for at least 8 hours, but when you woke up and looked in the mirror you noticed how puffy your eyes were? And yet you are 100% sure that you did not cry while sleeping. So why is it that you have puffy eyes? For sure, you want to get to the bottom of it because you do not want to use up another stick of concealer ever again. Mainly, the cause of puffy eyes is fluid retention (or mild oedema) which is common and most of the time usually harmless. However, puffy eyes can also be caused by deeper reasons. The good news is, the more watchful we are of little things that our body might be telling us, the more that we can do to prevent it. Here are some of the reasons we may have puffy eyes: 1. Too much intake of sodium As reported by Medical News Today , having too much salt in our body causes oedema or swelling. To balance this out, we need to drink enough water and limit our salt intake. I