Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain infection in upper back teeth can cause infection in
sinuses as the floor of maxillary sinuses lies very close to the root tips of upper teeth and at times the tips are almost inside the sinuses an infection progressing from the root tips to the area below the root tips there can also be infection in sinuses..
I would suggest you to consult an Otolaryngologist and get evaluated and a thorough clinical evaluation and investigations like PNS view
x ray or
MRI scan can help in diagnosis and treatment can be done accordingly..
You can be advised a course of antibiotics, anti-inflammatory painkiller like
Ibuprofen, decongestants like Pseudoephadrine, do saline
nasal irrigation, steam inhalation and use a humidifier in your room..
You can also be advised decongestant nasal sprays containing
Xylometazoline or
Oxymetazoline..
Avoid spicy and chilled foods..
Do warm compresses around nostrils..
If tooth is decayed
consult a Dentist and get evaluated and he can do an x ray and if tooth can be saved
root canal treatment can save the tooth and if tooth is grossly decayed extraction is advisable..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.