. She is careful to only land punches on the soft-tissues of the cheeks. However, she punches quite hard with bare knuckles, and it can take a 24 hours for the swelling
formation because of blood trapped in tissues. This blood may need to be drained. Less commonly, it may develop calcium deposits at the injury site in a process called heterotopic ossification. This is more serious.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your dermatologist. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.