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What causes many tiny pinprick-like pits on fingernails, and how should it be managed?

Apr 25, 2023 Source: Cainiu Health
Dr. Liu Wan
Introduction
In general, the appearance of numerous tiny pits on the nails may be caused by trauma, deficiency of trace elements, malnutrition, onychomycosis, or psoriasis. When the nail sustains external injury or damage—such as being hit, pinched, or crushed—such trauma may lead to structural changes in the nail plate, resulting in the formation of small pits.

Generally, the appearance of multiple tiny pit-like indentations on the nails may be caused by trauma, deficiency of trace elements, malnutrition, onychomycosis (fungal nail infection), psoriasis, or other conditions. The specific causes are as follows:

1. Trauma

When nails suffer external injuries—such as being struck, pinched, or compressed—the damage can lead to structural changes in the nail plate, resulting in small pits. Avoiding excessive use of the fingers can aid recovery.

2. Deficiency of Trace Elements

A common cause of pinpoint pits on nails is a lack of essential trace elements such as zinc or iron. These nutrients are vital for healthy nail growth and quality. In particular, zinc plays a crucial role in nail development; its deficiency can make nails brittle and prone to breaking, often leading to pitted marks.

3. Nail Malnutrition

When the body fails to absorb sufficient proteins, vitamins, and minerals, nail malnutrition may occur, leading to symptoms such as weakness, brittleness, cracking, and pitting. Therefore, maintaining a balanced diet and adequate nutrient intake is essential for preserving both the health and appearance of nails.

4. Onychomycosis

Onychomycosis is typically caused by fungal invasion of the skin around the nails. It may result in itching, pain, nail opacity, as well as nail deformation, thinning, or pitting. Patients should follow medical advice and may be treated with medications such as terbinafine hydrochloride tablets or griseofulvin tablets.

5. Psoriasis

Psoriasis is an autoimmune disorder in which immune system dysfunction leads to excessive skin cell growth. It affects not only the skin but also the nails. Nails of psoriasis patients often show symptoms such as dents (nail pitting), reduced adhesion, and a granular surface texture—pitting being one of the typical manifestations. Treatment under medical guidance may include topical applications such as salicylic acid ointment or pimecrolimus cream.

When numerous pinpoint pits appear on the nails, it is advisable to consult a doctor promptly and seek appropriate treatment based on the underlying cause. In daily life, maintaining a balanced and nutritious diet will support healthier nail growth and overall nail health.


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