I had a salivary gland infection (looking at the anatomy, you can see three glands along the jawline). I have had a cyst (salivary stone) or two come and go..For pain, try lemon drops to open up the Eustachian tubes, gently massage the area and use moist heat in the area. It is a strange thing, possibly related to dry mouth. Maybe something with sinus is going on with your cheek? Or, TMJ? Dentist told me to use ACT, or similar, xylitol mouthwash to take care of bacteria. These are just part of the weirdness of the disease. I look up the anatomy of the area so I can describe what is going on to the Dr and have been pretty successful with ice/heat, lidocaine patches, PT and other non-drug treatments. Of course, I am on the usual for MCTD and not much for supplements besides magnesium, D3 and B12 from the Dr.