N
- Nail patella syndrome
- Nail problems
- Narcolepsy
- Nasal and sinus cancer
- Nasal polyps
- Nasopharyngeal cancer
- Neck pain
- Necrotising fasciitis
- Neonatal herpes (herpes in a baby)
- Nephrotic syndrome in children
- Neuroblastoma
- Neuroendocrine tumours
- Neuroendocrine tumours and carcinoid syndrome
- Neurofibromatosis type 1
- Neurofibromatosis type 2
- Neuromyelitis optica
- Newborn jaundice
- Newborn respiratory distress syndrome
- Night sweats
- Night terrors and nightmares
- Nipple discharge
- Noise sensitivity (hyperacusis)
- Non-alcoholic fatty liver disease (NAFLD)
- Non-allergic rhinitis
- Non-gonococcal urethritis
- Non-Hodgkin lymphoma
- Noonan syndrome
- Norovirus (vomiting bug)
- Nosebleed
- NSAIDs