Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain a large sore in mouth over the cheek can be a Major Aphthae that is a larger variant of apthous ulcers or
canker sore..
Hanging is due to hanging of the pseudomembrane present over the top of the ulcer..
It can get traumatized and hang off..
I would suggest you to consult an Oral Physician and get evaluated and a thorough clinical evaluation and investigations like blood tests can help in diagnosis..
As of now you can start applying numbing gel containing Lignocaine to relieve the symptoms, you can also take a
multivitamin tablet daily, you can take anti inflammatory painkiller like
Ibuprofen, suck ice and do cool water rinses, avoid spicy food..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.