Mucus in nose/throat can have various causes, ranging in severity from 'needs attention' to 'serious'. Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.
Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms. In order to diagnose mucus in nose/throat, we could:
|High Histamine||1%||Ruled out|
Do you have a tendency towards producing excess mucus in your respiratory tract ("phlegm") or having chronic sinus congestion (runny/stuffy nose)?
Possible responses:→ No / don't know
→ Yes, moderate
→ Yes, severe
Histamine can cause additional mucus production.