Many diseases can cause<unk> . Based on patient history and physical examination we can diagnose the cause of<unk> .  The challenging part is differentiating anterior<unk>  from posterior<unk> .
Rhinoscopy is the best way to distinguish between anterior and posterior<unk> . In selected cases, endoscopy may be required.
Epistaxis differential diagnosis
Nausea and vomiting differential diagnosis
Stomatitis differential diagnosis
Lower gastrointestinal bleeding differential diagnosis
Epistaxis other imaging findings
Mallory-Weiss syndrome differential diagnosis
Odynophagia differential diagnosis
Anal fissure differential diagnosis