hi,thanks for query.First of all diagnosis is important.In case of deviated nasal septum
and blocked sinus
you need surgery.There are other methods like sinus wash etc,which can take care of this effectively.First of all get proper diagnosis is done,I hope you had undergone X ray
and other necessary investigation.Allergy
could lead to recurrent infection.Avoid cold drinks,junk food etc.Have more of hot soups,tea/coffee etc.
wishing you good health.