Your body has a lot to tell you. All you have to do is listen. From aches and pains to feelings of euphoria and relaxation, pretty much everything you feel indicates some bigger fact about your health and wellbeing—sometimes quirky or reassuring, but sometimes alarming. And this only becomes the case more and more as you get older. While often it’s obvious what your body is trying to say, at times, it can be totally subtle, vague, or even straight-up counterintuitive. To that end, here are 20 such messages to be aware of. And for more amazing health advice, Here Are 40 Health Mistakes You’re Too Old to Make After 40.