Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain swelling infront of the ear and under the ear seems to be involving the Parotid
Salivary Gland that is a major salivary gland..
Painless and slightly tender swelling of the gland that goes down normally and increases on eating can be due to obstructed duct of the gland that flows saliva from gland to mouth..
It can get obstructed with either any foreign body or formation of stones in the ducts of the glands..
As saliva flow increases during meals there is backflow of saliva into gland rather than coming in mouth and the swelling seems to be increasing..
I would suggest you to consult an Oral Physician and get evaluated and along with a thorough clinical evaluation he can also advise you
x ray or
MRI of the gland to confirm the cause..
In case of superficial stones manual removal can be done..
In case of deeper obstructing stones surgical removal is advisble..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.