Thanks for the query.Bruise
is mainly caused due to trauma, may be you have not noticed a minimal trauma.
It is the natural process of healing in which a bruise changes color.
so please dont worry about change in color.
Throat pain and bump on jawline may not be related to this.
Please meet a dermatologist
if the lesion persists.
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.