Not to be confused with Beau's lines (which are horizontal grooves), longitudinal grooves are vertical grooves that are caused by trauma to a specific area of nail growth. This could be via a cyst or wart.
Lichen planus is an inflammatory skin condition that can affect the nails as well as most other parts of the body.
Paronychia is an infection that occurs when there is breakdown in the seal between the skin and the nail plate.
Common but painful, ingrown nails are often the result of poor care — and infection may follow.
Beau’s lines are ridged or grooved lines that run horizontally across the nail.
Sometimes called onychorrhexis or onychoschizia, brittle nails peel, split, and break easily.
Doug Schoon’s Brain DVD
Get a free preview issue and a Free Gift