Thank you for posting your query.
It is unlikely for the swelling on your left temple to be related to one year old mild head injury
So, the current swelling needs to be evaluated, even though it may not be a serious issue.
Please get it checked up by your family GP.
Please get back if you require any additional information.
Dr Sudhir Kumar MD (Internal Medicine), DM (Neurology)
Senior Consultant Neurologist
Apollo Hospitals, Hyderabad,
My personal URL on this website: http://bit.ly/Dr-Sudhir-kumar
My email: email@example.com