Welcome to healthcare magic!
The swelling over the cheek has been due to a hypersensitivity
reaction most likely.
Immediate risk is very high in form of a fall in blood pressure and swelling in the airway that can cause choking
. Now because 5days have gone by that kind of risk is not in the horizon.
The remnent swelling would also resolve slowly and as a rule will resolve by itself.
It needs some time, avoid pressing/checking it too frequently.
Please put a follow up query if any.
I hope you would get benefited with my advise.
Wish you a good health.