When you look in the mirror each morning, the person looking back at you is a little different than the one who went to bed a few hours ago. It's easy to forget, but people's bodies are always changing in some pretty fascinating ways, even while sleeping. In fact, there are plenty of physical ways your body is different in the morning versus the evening. Everything from your spine to your salivary glands are making changes and adjustments while you snooze.
Although it may be easy to picture your body as a static thing, it's always in motion. Blood is flowing, air is entering the lungs, and your body temperature is adjusting all the time. (It's a good thing so many of the body's functions are automatic, right? It would be exhausting if people had to consciously think about all this stuff.) Although in many cases these changes are very minor, sometimes there's a noticeable difference in your morning body and your nighttime body. Height, foot size, and even salivary production can make a noticeable difference, and you can even measure these things for yourself before and after bed. Here are the ways that your body may not be the same when you wake up from when you go to sleep.