what is an annoying yet not-that-serious thing that your body does

Okay, so my stomach literally feels so bad no matter what i'm doing/eating/sleeping these days - idk if it's a sign of homesickness or a sign that i need to change up my diet, my stomach is just eternally upset with me.

what is your equivalent? an always present headache? a muscle cramp in your thigh? i'm sitting here with a cramping stomach and very much nosy to be in your business