Necrosis – Mortification of bones or tissue.
Nephrosis – Kidney degeneration.
Nepritis – Inflammation of kidneys.
Nervous prostration – Extreme exhaustion from inability to control physical and mental activities.
Neuralgia – Sharp and paroxysmal pain along the course of a sensory nerve. There are many causes: anemia, diabetes, gout, malaria, syphilis. Many varieties of neuralgia are distinguished according to the part affected, such as face, arm, leg.
Nostalgia – Homesickness.
