Buteyko Breathing and Approach of Smoking Hygiene: Effects on Dysfucntion of Eustachian Tube and Lung Functions

in this study, we will randolmly recruit 40 adolescents who are usually exposed to tobacco smoke passively in house from smoking parent or household members. these adolescents will complain chronic dysfunction of their Eustachian Tube (chronic obstructive dysfucntion) . adolescents will be catagorized to one of both groupsl, group I or group II (N=20 patient in the group). Both groups will receive smokinh hyeigne approach for 6 months. Group I will additionally receive Buteyko Breathing 30-minute apprach (this appraoch will be appleid by patients all days, except fridays, weekly for 6 months).