Hello and thanks for the query
The bump can be a sebaceous cyst
or a collection of tissue (like blood clots
) formed due to the injury
. Consult your ENT specialist
, he can tell you better by clinical examination and certain investigations like Fine needle aspiration test (FNAC). Depending upon the reports and clinical examination you can go for removal of the bump as per direction of your treating doctor.
Hope I have answered your query.