Hi welcome to Heaith care magic forum, Sinusitis
is a disease as a result of allergy
super imposed by the infection. you can control the infection but the allergy is a difficult to control isseue, as uniess the allergen causing must be identified first and it should be omitted from the lively hood.
For example the fish, other sea foods, fruits, juices, and brinjal are some commen allergen containing foods. These may not cause allergy to to all but allergic to majority. Besides these there are so many foods and flowers, dresses, A.Cs at work place, etc are allergic with individual variation.
If allergens are kept away, you wont get cold
attacks and sinusitis is not recurred.
Regarding suggesting an E.N.T.surgeon we can't suggest from here, you can search in the net and find out. Or you may consult an E.N.T.surgeon of H.C.M specialist surgeon.
Wishing for a quick recovery and thanks for calling.