Hi, My father has swelling on left side of face and he is struggling to open his mouth completely. There is some pain when trying to open the mouth. In the last 2 days the swelling has slightly increased and now only a little bit of mouth can be opened to eat food He has recently undergone cataract surgery for right eye, not sure if that has something to do with it Need some guidance on which doctor we should consult and if this is a serious issue as have not seen this much Thanks Vijay