welcome to health care magic
Thanks for your query
You didn't mention in the query about your age and sex whether you are male or female..
The swelling under ear lobule might be a parotid gland
swelling..it swells either because of tumor
or in taking of alcohol..or may be due to infection...
Go for FNAC (fine needle aspiration cytology) of the swelling and consult surgeon for more suggestions and treatment.
Hope you understand my suggestion
Have a speed recovery