 [ Symptoms ] i have a nasal cyst which is caused by my teeth i can not really breath [ Disease ] hi breathing difficulty is due to cyst as well as deviated septum however the pus drainage is due to abscess i suppose and not a cyst being a dental surgeon i would suggest you to first of all send me your x rays so that i can evaluate them accordingly and advise you the treatment however such conditions needs surgical treatment but still an x ray will give me a better understanding hope this helps