Clear, watery nasal discharge is often related to common causes such as allergies or rhinitis, and in less common cases may need a specialist evaluation to rule out other causes. Choose the description closest to your situation.
Runny nose linked to allergies or rhinitis →
Clear discharge that may come with sneezing, itching, or congestion, and may be related to allergic or non-allergic rhinitis.
Ongoing clear fluid from one side →
In some cases, especially when the fluid is ongoing from one side or increases with leaning forward, it may be appropriate to evaluate for a cerebrospinal fluid leak.
This cause is less common than allergies and rhinitis, and needs specialist evaluation when the symptom pattern is appropriate.
Not sure of the cause →
You can start with the rhinitis page to learn about the more common causes of clear nasal discharge.