Hello there...based upon your symptomatic presentation the swelling over the cheek appears to be a buccal space infection
....Any history of application of topical balms, hot fomentation would result in increase swelling...Please avoid all that...The extra tooth you are mentioning could be wisdom tooth, that is partially erupted, impacted...or could be a supernumerary tooth also..... The bump you see on the gums is a result of pus accumulation beneath the mucosa...Avoid smoking
and alcohol as that may aggravate his condition...
If its a pus filled swelling you have get it incised and drained...Visit a Oral and Maxillofacial Surgeon only for clinical evaluation and management.