Suggest Treatment For Swelling In The Lower Cheek Of An Elderly Person

Question: Hi there. I would like to ask you about my elderly 83 and half years old father who had recurrent lower cheek swelling that had occurred five times since XXXXXXX this year. The first episode occurred in XXXXXXX over his right lower cheek- soft, non tender, no redness , no associated tooth ache. No fevers. Resolved within 24 - 48 hours . Not sure if infection but got treated with seven days of keeled. The second episode (similar) occurred in July over left lower cheek. Since then has had monthly recurrences and got given short courses of amoxicillin and flatly for five to seven days. Had been to see dentist. Latest episode occurred two days ago over his right lower cheek again, dentist not so sure and thinks probably due to pressure effect as they seem to occur each morning on waking after he had been lying over the site of where swelling appears. No itchiness. No increase saliva. No peri orbital Edema associate. But I am not convinced that it is due to pressure alone. Can you help please.