What is sinus
What is sinus ? What happens if a person has sinus ? I go out in cold / free air / sit under an A.C and catch cold often , is it sinus ? What happens if I undergo a surgery for sinus ? Will the sinus go away ? What does it mean for sinus to go away ? Will I not catch a cold then by cold air / a.c (only catch cold like/when a normal person does). Thank you.
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