<human>: Im a 30 year old woman with a history of chronic sinus infection.  A few months ago I suffered a very bad bout of infection - it was so bad that my left cheek became tender and swollen.  After two courses of antibiotics it had cleared enough to reduce the swelling, but I didnt realise that it hadnt cleared completely.  Ive noticed that my face is still slightly swollen on the left and today I noticed that its very tender and a small, soft (apparently liquid filled) lump has appeared high on my gum line slightly behind my upper left canine.  Would this be related to the sinus infection?  I have a very high pain threshold and havent noticed anything other than pressure and tenderness in the affected area.
<bot>: Your swelling may be due to two reasons.1. Dental abscess that is formation of pus deep to the root of a tooth. sometimes this may be painful or may be pain less.2. Chronic sinusitis leading to accumulation of pus in the maxillary sinus. I suggest you to consult a ENT specialist and take advise regarding sinusitis. An X-ray may reveal the source. And a small surgery may be necessary. If there is no fluid there in sinus, consult Dentist for opinion about Dental access.