hi
welcome to healthcare magic forum
it has no relation with the tore ligaments .
your
bruise may be due to some
injury or internal reason related to blood .
as you feel uncomfortable and it become bigger means it has some internal reason .
you required to some
blood test and consult the doctor .
if you have fever ,
body ache or other systemic symptoms than there is chance of viral infection .
i hope i answered your question .