Why does clear fluid drain out of my nose when i bend over?

Rule out CSF.: You need to have a physician look at the roof of your nose with an endoscope or microscope to rule out cerebro-spinal fluid rhinorrhea. This is a potentially dangerous situation. On the other hand, you could have nasal polyposis or allergic rhinitis. GET A DIAGNOSIS.

Nose: Many causes including allergies, a cold, meds and the one we worry about which is cerebrospinal fluid. See an ENT to check it out. Will need a ct scan and other tests