Traumatisms: Frequent traumatisms in the toenails, due to blows, inadequate narrow shoes  or sports activities among others.

Tricotiodistrofia: Deficit in the cuticle contents in cisteina and metionina

Trichinosis: Is  associated to hemorrhages in splinter

Atrophic Fingernails: Minor development of the fingernails and decrease of thickness and texture. For endocrine alterations, for traumatic or infectious causes

The guitarist’s fingernails: Due to micro traumatisms produced by the guitar’s strings, they turn their fingernails much more vulnerable to deformations and breakings.

Ectopic Fingernail: Fingernail that grows in the adjacent tissues plate’s of the nail.

Ingrown nails: The ingrown nail is the consequence of a fragment of fingernail that penetrates in the flesh and that provokes inflammation and pain.

Fingernails in glass of clock: Convex black or gray fingernails with hippocratic finger in drumstick.