HI, thanks for using healthcare magic
Sinutitis is inflammation of the sinuses, it may exist on its own or along with rhinitis (inflammation of the nasal passages-sneezing, nasal congestion
, runny nose).
The most common causes of sinusitis are allergies or infection (most commonly viral).
The post nasal drip
would result in the cough and may also influence the smell in the throat.
This can be controlled with topical nasal sprays and anti histamines
. Some examples of topical nasal sprays are nasonex, nasocort, rhinocort, flonase, beconase. One of these may be available over the counter.
Avoiding the source of the allergy would also be important.
In terms of tonsillectomy- this would be suggested if there is : (1) history of sore throat
due to acute tonsillitis
(the post nasal drip itself can cause sore throat)
(2)the episodes are severe
(3)at least 7 episodes in the last year or 5 in each of the last 2 years
I hope this helps