Clear Fluid From the Nose: How Is a CSF Leak Distinguished?

Frequently Asked Questions

What does this condition mean?

CSF rhinorrhoea means that fluid surrounding the brain and spinal cord passes through a skull-base defect into the nose. It can follow trauma or surgery, or arise spontaneously and sometimes relate to altered intracranial pressure. Correct diagnosis matters because the defect can provide a route for meningitis.

Does it always mean a serious disease?

Water-like flow from the same nostril, increase on bending or straining, and a salty or metallic taste may raise suspicion but are not specific. Allergic drainage is more often bilateral with sneezing and itch. Report head trauma, nasal, sinus, ear, or skull-base surgery, and any previous meningitis.

How is it diagnosed?

After ENT examination and nasal endoscopy, a properly collected sample can be tested for beta-2 transferrin or, in some centres, beta-trace protein. Thin-section high-resolution CT, MRI, or MR cisternography is selected to localise the defect. Home glucose strips and a halo on tissue are not reliable diagnostic tests.

How is treatment selected?

A skull-base team plans care according to cause, site, flow, and timing. Some traumatic leaks close under close observation, while persistent or spontaneous leaks are commonly repaired endoscopically. A related intracranial-pressure disorder is assessed to reduce recurrence risk.

What should I avoid doing at home?

Do not plug the drainage, blow the nose forcefully, or strain. Do not start antibiotics yourself; ask the clinic how to collect a laboratory sample without contamination. Record the affected side and any relationship to trauma or surgery.

When is urgent assessment needed?

Fever, severe headache, neck stiffness, light sensitivity, vomiting, confusion, or seizure may signal meningitis and is an emergency. New head trauma, neurological loss, or heavy continuous clear flow also requires immediate assessment.