It is very difficult to say what exactly that you have. If there is pain and fever
along with pressure in the ear then it could be a ear infection
which has spread outside. If there isnt any then it is likely that the swelling has come back and this time it maybe deep seated and thus the absence of lump. If you feel the symptoms are persisting then it is better you visit a ENT specialist
to rule out the exact cause of the problem and get the needed treatment.
I hope you found my response to be helpful and informative. If you have any additional concerns I would be happy to address them.