Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns...
As per your complain the white stuff that you noticed over the gums near your extraction site does not seems to be anything harmful but can be some food debris that have accumulated in that area or it can be dead tissue that remained stuck to the gums..
Due to swelling there must be reduced clearing of food debris as well reduced movement of tongue leading to deposition of debris including thick
Plaque like layer over gums..
The itchy feeling and feeling of biting down needed not to be worried for as at times during the initial process of healing there can be such a feeling which will ease gradually..
As swelling is commonly seen after surgical extraction of teeth so that needs not to be worried for as the
swollen cheek is due to inflammation caused commonly after surgical procedures and will subside gradually, just take care not to bite over it as it will further induce swelling and pain...
You should follow the instructions given to you by the treating Surgeon and do warm saline gargles..
For swelling apply ice packs over the cheek..
In a period of over 8 to10 days the swelling will resolve considerably..
Hope this information helps..
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Thanks and regards..
Dr.Honey Nandwani Arora..