Highly improbable: It is possible to have brain (encephalocele) or the intracranial membranes (meningocele) or a combination of the two prolapse from the cranial cavity into the nose and sinuses.Most of these are after sinus surgery or trauma, not from nose blowing.If there is a defect between the nose and cranial cavity nose blowing can force air into the cranium (pneumocephalus).Worry if water drips from one nostr.
Answered 12/24/2020
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