[…] the mouth (difficulty or pain upon opening the mouth very wide or when swallowing).
[emedicinehealth.com]
The swelling often causes difficulty in opening the mouth and lead to facial asymmetry.
[healthhype.com]
With an advanced infection, one can experience other complications such as: nausea, vomiting, fever, chills, and difficulty swallowing, opening the mouth, or breathing.
[emedicinehealth.com]