What are the causes of koilonychia in picture the black color is mehnd

What are the causes of koilonychia in picture the black color is mehndi bit nails are becoming flat

Reading File

Finding Sources

Searching PubMed

koilonychia causes etiology

Reading File

Finding Sources

Reading File

Finding Sources

Loading Image

Looking at the image you shared, the nails are clearly flat/concave (spoon-shaped) — this is classic koilonychia. The dark color is from mehndi (henna) as you mentioned, not a pathological change. Here is a comprehensive breakdown:

Koilonychia (Spoon Nails) — Causes & Overview

What it is: The nail plate becomes thin, flat, and eventually develops a concave (scooped-out) shape where the edges curve upward — like a spoon. Your image shows this clearly across multiple nails.

Textbook reference image of koilonychia (spooning):

Causes

1. Iron Deficiency (Most common systemic cause)

Moderate iron deficiency first causes fragile, longitudinally ridged, brittle nails
As deficiency progresses → nail plate thins, flattens, then becomes concave = koilonychia
The index and middle fingernails are usually most severely affected
Associated features: pallor, fatigue, glossitis (smooth tongue), angular stomatitis
Even after starting iron replacement, koilonychia resolves slowly
Plummer-Vinson syndrome: iron deficiency + dysphagia + koilonychia + glossitis (seen in middle-aged women)
Fitzpatrick's Dermatology, p. 2253 | Goldman-Cecil Medicine

2. Physiologic (Normal variant)

Common in young children (ages 1–4), especially toes 2–4
Resolves spontaneously — not pathological
Dermatology 2-Volume Set 5e

3. Occupational / Chemical exposure

Repeated contact with petroleum products, solvents, detergents, or alkalis damages the nail plate
Common in manual laborers, housewives with prolonged water/detergent exposure

4. Inflammatory skin diseases

Lichen planus — often with other nail changes (trachyonychia — rough, sandpaper nails)
Psoriasis (less common for koilonychia specifically)

5. Nutritional deficiencies

Iron deficiency is the classic one, but severe malnutrition can also cause it

6. Hereditary/Idiopathic

Rare familial forms exist (autosomal dominant)

What to Do

Given the clinical picture, the most important step is to check for iron deficiency anemia:

Test	What to check
CBC	Hemoglobin, MCV (low in iron deficiency)
Serum ferritin	Most sensitive marker for iron stores
Serum iron + TIBC	Low iron, high TIBC = iron deficiency
Transferrin saturation	Low (<16%)

Treatment: If iron deficiency confirmed → oral iron supplementation (e.g., ferrous sulfate). Nail changes improve slowly over weeks to months after treatment begins.

Bottom line: In an adult with koilonychia affecting multiple nails like in your photo, iron deficiency anemia is the most likely cause and should be investigated with a simple blood test. The black color on the skin and nails is just mehndi/henna and is not a concern.

Find clinical images of koilonychia in different severities

Searching Images

koilonychia spoon nails clinical appearance severity

Finding Sources

Loading Image

Finding Sources

Loading Image

Reading File

Here are clinical images of koilonychia across different severities, with context for each:

Koilonychia — Clinical Images by Severity

🟡 Mild — Early Flattening (Loss of Normal Convexity)

Mild koilonychia — flat nails, early stage

What to see: The nails have lost their normal dome-shaped convexity and appear flat. Pale nail plates suggest underlying hypochromic state (iron deficiency). The lateral edges are starting to evert upward. Skin and cuticles otherwise intact.

🟠 Moderate — Concave Spooning, Macro Close-up

Moderate koilonychia — clear concave spoon shape, DermNet

What to see: Classic moderate koilonychia from DermNet. The nail plate is thin with a pronounced central depression. Lateral and distal edges curl upward. Longitudinal ridging is visible. The nail surface has mild translucency. At this stage, iron deficiency is typically well established.

"Spoon nails are thin and concave, with the edges everted so that if a drop of water were placed on the nail, it would not run off." — Andrews' Diseases of the Skin

🔴 Severe — Advanced Koilonychia with Chromonychia (Both Hands, Inpatient)

Severe koilonychia — both hands, hospitalized patient with brownish discoloration

What to see: Severe koilonychia affecting all fingernails bilaterally in a hospitalized patient (IV line visible). Nails are deeply concave, thin, and brittle with brownish-dark discoloration (chromonychia). This is consistent with advanced, chronic iron deficiency anemia (Plummer-Vinson syndrome pattern). The skin also shows pallor.

🔄 Before & After — Resolution After Treatment

Koilonychia resolving after treatment — three-panel comparison (A: active, B: resolving, C: resolved)

What to see:

Panel A — Active koilonychia: nails are flat with concave, spoon-shaped distal ends (red arrows)
Panel B — 8 months after treatment: concavity visibly reduced (yellow arrows), curvature normalizing
Panel C — 1 year post-treatment: nails have returned to normal convex contour (white arrows)

This illustrates that koilonychia resolves slowly even after the underlying cause is corrected — nails regenerate at ~3 mm/month.

Severity Summary

Severity	Nail Change	Likely Stage
Mild	Flat, loss of convexity, pale	Early iron depletion
Moderate	Clearly concave, ridged, edges everted	Established iron deficiency
Severe	Deep spooning, brittle, discolored	Chronic/advanced deficiency (Plummer-Vinson)
Resolving	Gradual return of convexity	Post iron supplementation

Sources: Andrews' Diseases of the Skin; Dermatology 2-Volume Set 5e; Fitzpatrick's Dermatology; DermNet NZ

Create a quick reference PDF on nail dystrophies and systemic causes

Reading File

Finding Sources

Searching Images

nail dystrophies systemic disease clinical signs

Finding Sources

Searching Images

Terry nails half and half nails Lindsay nails renal failure hepatic cirrhosis

Finding Sources

Searching Images

nail clubbing digital clubbing pulmonary cardiac disease

Finding Sources

Searching Images

Beau lines nail transverse grooves after illness chemotherapy

Searching Images

nail pitting psoriasis onycholysis subungual hyperkeratosis

Finding Sources

Running Command

Writing File

Running Command

Your PDF is ready:

📄

Nail Dystrophies Quick Reference

PDF Document · PDF

What's inside (4 pages)

Page 1 — Koilonychia + Clubbing

Clinical images for each, causes by system, key diagnostic tips

Page 2 — Beau Lines / Leukonychia Patterns / Psoriatic Nails / Lichen Planus

Terry's nails, Lindsay (half-and-half) nails, Muehrcke's & Mees' lines
Post-chemotherapy Beau + Mees combined image
Psoriatic nail matrix vs nail bed findings with NAPSI context

Page 3 — Master Reference Table (12 nail signs)

Nail Sign	Appearance	Systemic Causes	Investigation
Koilonychia	Spoon-shaped	Iron deficiency, Plummer-Vinson...	Ferritin, TIBC
Clubbing	Lovibond ≥180°	Lung Ca, IPF, CCF...	CXR, Echo
Beau lines	Transverse grooves	Sepsis, chemo, COVID...	Nail timing
Terry's	Proximal white	Cirrhosis, CCF, DM...	LFTs, albumin
Lindsay	Half-and-half	CKD / uraemia	eGFR, creatinine
… and 7 more

Page 4 — Systematic Examination Approach + Key Investigations

6-step nail exam protocol
Lab workup organised by category (haematology, biochemistry, immunology, microbiology, imaging, toxicology)

Sources: Goldman-Cecil Medicine, Andrews' Diseases of the Skin, Fitzpatrick's Dermatology, Dermatology 2-Vol Set 5e, Harrison's Principles 22e.

This is a shared conversation. Sign in to Orris to start your own chat.