Watery tap like continuous nasal discharge
Watery tap like continuous nasal discharge can be caused by anything that irritates or inflames the nasal tissues. Infections — such as the common cold and influenza — allergies and various irritants may all cause a runny nose. Some people have a chronically runny nose for no apparent reason — a condition called nonallergic rhinitis or vasomotor rhinitis (VMR).
Less commonly, runny nose can be caused by polyps, a foreign body, a tumor or migraine-like headaches.
- After nasal allergy is excluded, a CSF ( Cerebro Spinal Fluid) leak from the brain has to be ruled out ( CSF Rhinorrhoea)
- Handkerchief test : If the handkerchief gets stiff on drying then the discharge is nasal secretion. If the handkerchief remains limp on drying then the discharge could be CSF.
- Glucose test: Normally glucose is absent in nasal secretion. If on examining a sample of nasal secretion in the lab it is reported as positive for glucose, it could be CSF.
- CT/MRI Scan of the PNS