How to prevent foreign body inhalation in cases of nasal foreign body . ?

Nasal foreign body: Assuming you have a foreign body in the nose, the foremost strategy would be to remove the foreign body. Your nose will be much happier that way, too. If the foreign body can't be taken out right away, avoid sleeping on your back, breath with your mouth open and expedite getting it out. Removal of nasal foreign bodies is typically not something that should wait...Not even longer than a day.

Nasal foreign body: I think you should make an appointment with an ent. In my experience, many primary care physicians and emergency room physicians don't do this often, and may push it further in as they rarely have the correct tools.