Dents in fingernails: why pattern matters more than a vitamin guess

Small pits can accompany skin disease

AAD describes small, icepick-like nail dents in conditions including psoriasis, atopic dermatitis and alopecia areata. A clinician can assess the nail together with the surrounding skin and other symptoms. A single visual feature cannot establish which disease is present. [1]

A groove across the nail tells a different story

Deep transverse grooves can follow an interruption in nail growth after illness, injury or other substantial stress. That differs from scattered tiny pits. The distinction helps explain why a general nail-vitamin recommendation may miss the actual problem. [1]

Document the change for assessment

Imagine several nails develop dents without a remembered injury. Note which nails are affected and when changes began, then arrange assessment. The useful question is what affected nail growth or the nail unit; supplementation is only relevant if a nutritional need is established. [1]

Hypothetical example — use symptom context rather than guessing a missing vitamin
Situation	Useful distinction
Tiny pits	Can accompany inflammatory skin disease
Deep transverse groove	Can mark interrupted growth
Dents alone	Do not identify a missing vitamin

Dents in fingernails: why pattern matters more than a vitamin guess — original article outline diagram — Original editorial diagram of this article’s sections; no product photograph or clinical finding is depicted.

Sources for this article

12 nail changes a dermatologist should examine
Source consulted: 2026-09-20. This is a reference resource, not a claim that we conducted the studies or tested a product.