I have had bad teeth my hole life, used to go to dentists on weekly basis but there work kept making things worse they didnt even notice a grinding problem I had till it was too late now my teeth are massive rotten and I have a bad pain with a pressure feeling now right next to my nose connected to whats left of my canine tooth, the pain has gone down a little but still has a swollen pressure feeling to it, there sees to be some puffiness next to my nose leading towards the  inner corner of my eye , amazingly I have never had an abscess before and I read that one in this area can kill me if untreated could this be the start of a deep abscess? and should I be concerned?
Thanks for your query, I have gone through your query. Since you are giving history of grinding your teeth. If the tooth structure is abraded and involving the pulp then it can result in abscess formation. Consult an oral physician and take radiograph to rule out infection. If there is tooth infection then get the tooth treated can take a course of antibiotics like amoxicillin 500\u00a0mg and metronidazole 400\u00a0mg TID for 5 days(if you are not allergic). After taking antibiotics you can get the tooth treated with RCT or extraction. You have to get treated with splints for grinding your teeth. I hope my answer will help you, take care.