Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain it seems that due to hitting of the shin there has been traumatic
injury to the soft tissues and the bruising seems to be due to ruptured blood vessels secondary to injury causing spillage of blood into soft tissues..
A large knot seems to be due to
HEMATOMA formation that is a harmless
tumor of the blood that is spilled from blood vessels..
As all other symptoms subsided and you are left with only a knot there, it is due to Hematoma that can take a few months to resolve..
You can start doing alternate warm and cool compresses over it..
You can also apply
Heparin gel as it helps in disruption of hematoma..
In case if still there is no improvement
consult a General Surgeon and he can do a surgical removal of the hematoma..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.