have had swelling and a lot of pain on left side of face and jaw next to ear and down into neck.No doctor has been able to identify the cause.This has been going on for about 4 years.Had an ENT scope my throat and it was clear.It flares up and gets swollen and very painful ,then it goes down after a few days,but it always feels tender and painful.It doesn't hurt to chew,and I have enough saliva,I actually drool in my sleep.I can't find any answers from anyone.I went to my MD,and an ENT.I really want to find out what this is.