Thanks for writing to us.
The hard lump that you have noticed is likely to be due to a local bleeding causing a hematoma
formation. You need to self monitor yourself for any headache, vomiting
, bleeding from nose, ear, etc or a neurological deficit. If any of these appear, do rush to ER.
I hope this information has been both informative and helpful for you. You can consult me again directly through my profile URL http://bit.ly/Dr-Praveen-Tayal
Dr. Praveen Tayal