You probably just bumped into something without noticing, it’s probably nothing to worry about.
Though bruises appearing out of nowhere, by themselve, may indicate a serious illness (I’m not gonna mention it so you don’t get spooked), so it’s best to see a doctor and do some blood work, including D-Dimers.
D-dimer is a protein fragment (small piece) that’s made when a blood clot dissolves in your body. D-dimer isn’t usually found in your blood unless your body is making or breaking up blood clots.
You probably just bumped into something without noticing, it’s probably nothing to worry about.
Though bruises appearing out of nowhere, by themselve, may indicate a serious illness (I’m not gonna mention it so you don’t get spooked), so it’s best to see a doctor and do some blood work, including D-Dimers.
What are D-Dimers?
I was curious as well, so I did the Google:
Linky: https://medlineplus.gov/lab-tests/d-dimer-test/
Ah, okay. Thank you.
It’s basically an indicator if your body is producing coagulants in higher ammounts than it should be.