Nail discoloration
Nail pitting
Nasal congestion
Nasal discharge
Nasal polyps
Nausea
Neck pain
Neck stiffness
Neck veins distended
Neonatal seizures
Nephrocalcinosis
Neutrophil nuclear hypersegmentation
Neutrophilia without infection
Nikolsky's sign
Nipple discharge
Non-caseating granulomas
Normal anion gap metabolic acidosis
Normoblasts
Nosebleed
Nystagmus