For instance, the development of unilateral watery rhinorrhea after head trauma with resultant anterior skull base fracture warrants little effort for diagnosis conﬁrmation.
A large number of sinonasal inﬂammatory conditions- including both seasonal and perennial allergic rhinitis and noninﬂammatory conditions, such as vasomotor rhinitis-may produce watery rhinorrhea.
When the ICP is elevated, the headache occurs; however, when the CSF leak, which manifests as watery rhinorrhea, releases that elevated ICP, the headache improves.
During the physical examination of a patient with a suspected CSF leak, the physician should attempt to demonstrate the unilateral watery rhinorrhea by having the patient lean forward.
For many patients, watery rhinorrhea may seem trivial, but aggressive patient education is warranted to correct that potentially fatal misconception.
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