Am asking for a friend who lives in.Tasmania , no
Stop medications, start antihistamine. Steroid may be needed.
Thanks for your query for your friend in Tasmania.
It looks that pain medication or something else caused the said problem.
Your description is suggestive of a condition called angioneurotic edema.
Please ask her the following:
Stop the pain medications of any sort.
Take an antihistamine.
May need oral steroids: needs a prescription.
Also ask for any fever or infection in oral cavity or near the swollen area.
These may help to resolve her problem.I hope this answer helps your friend.
Please give feedback.