onychodystrophia mediana canaliformis (tic habit)

Etiology

• compulsive habit of picking at the nail fold

Pathology

• repeated injury of picking at the nail fold damages the nail matrix
• the nail plate grows out abnormally

More general terms

• onychodystrophy (nail dystrophy)

Additional terms

• nail fold (paronychium)
• nail matrix
• nail plate