kelly, Welcome to this site. You need to do a search on salivary glands. There are some in front of and slightly below the ears called the Parotid, one on each side under the chin called the submaxillary and 2 others called the submandibular that are under the chin also. Do a search using "images" in the sentence and you should find some good pictures.
These glands will swell up from time to time. Some people have terrible swelling and others much less. The parotid glands are the ones that get the mumps and they can cause misery for sure. Make sure to suck on lemon drops to help keep the saliva moving. You need saliva to help keep the salivary ducts from plugging up with thick mucus.
Also, use warm packs on the face and neck/throat area and massage these areas gently. This also helps to stimulate the glands to move some saliva through the ducts. These ducts can plug up and get infected and little stones can also form from the chemicals in the saliva.
There is also lymphoid tissue in the throat, base of tongue areas, etc and when a person is having a flare or the sjogrens is being very active many of the white blood cells will migrate to this lymphoid tissue. Our body is trying to kill us off and these white cells think they are helping us but they are really making things worse for us.
You should read a lot of the posts including the older ones on this site and also do a lot of searches on the web. Just know that you can't always believe what you read. Try to search university sites on sjogrens, etc. Good luck. Irish