Yesterday, after eating a sandwich, I had an allergic reaction where the left side of my neck from my ear down to my neck started to swell.  I took a benedril and it went down.  Everytime I eat anything, the swelling comes back.  There is pain from the pressure on my ear.  I have expereienced this 4 times  in the last 12 months.  I dont know what I am allergic to which triggers the reaction.
Hi I do care for your concern. Your history suggest more of allergic reaction occurring in parotid gland. More details such as your age and whether any allergy present will help a lot to arrive at diagnosis. I would advise Consulting your dermatologist and have tested for the substance causing allergy. Ben Chat Doctor.  Hope everything gets well soon. Hope I have answered your question, if you have more feel free to ask. Thank you.