My sister had something similar to what you are describing. Her face ended up ballooning. She went to the hospital and it was an infected blocked saliva gland. She had IV antibiotics and it all cleared up. Definitely get it checked out x
thats what it turned out to be, blocked saliva gland, its gone down heaps but is still a lump there. having an ultra sound to see if its still blocked. was told to chew gum to keep the saliva flowing and drink plenty. dont know what they will do if its still blocked???

thanks all