Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns.
As per your complain hard lump over the cheek that is hard seems to be due to
Hematoma formation which occurs due to rupture of blood vessels post
injury and spillage of blood into the soft tissues..
At times the Hematoma gets localized and encapsulated and become a hard and firm lump that takes a long time to regress in size..
It doesn't seems to be infection bit looks like Hematoma only..
I would suggest you to do alternate warm and cool compresses over the lump atleast 3 to 4 times a day..
You can also give her Anti-inflammatory painkiller like
Ibuprofen..
Apply
Heparin containing gel as it helps in faster disruption of Hematoma.
In case of it does not show improvement in next 15 days consult a General Physician and get evaluated..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.