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Nails, Dry And Brittle (Chip, Peel, Crack, Break Easily)

DSCN4758aWhat Are Brittle Nails?

[dropcap]B[/dropcap]rittle nails are abnormalities of the nail plate that are characterized by poor nail structure affecting all fingernails and toenails seen as thin, dry nails that easily chip, split, and are difficult to maintain a clean edge. Usually longitudinal ridging occurs from the nail base to the tips.

Q: What is the nail plate?

A: The nail plate is the hard keratin cover protecting the finger tip and toe tip. The nail plate (non-living tissue) is produced by the nail matrix (living tissue) at the base of the nail plate under the lunula (moon), which is the site of brittle nail development.

Nail Anatomy. A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.org
Nail Anatomy. A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.org

Poor nail structure affecting all nails may be a feature of nutritional deficiency in poor diet or malabsorption such as occurs in celiac disease.

Some other causes are: idiopathic (unknown cause), the result of aging, the effects of certain drugs, or an association with systemic autoimmune disorders such as vitiligo, alopecia areata (with pitting), psoriasis (with pitting), and lichen planus. 

External (non-nutritional or disease) causes of dry, brittle nails, such as detergents and cleaners, would only affect fingernails but not toenails.

Note: It has been shown that working with your hands in water or soaking them through activities like swimming does not cause dry, brittle nails but will worsen them.

What Are Brittle Nails In Celiac Disease and/or Gluten Sensitivity?

Nails, Horizontal Ridges (Beau’s Lines), Fragile

Beaus lines in thin nails (The tiny brown streak is a splinter hemorrhage.)
Beau”s lines in a thin nail. (The tiny brown streaks are splinter hemorrhages due to vitamin C deficiency.)

What Are Horizontal Ridges In Fragile Nails?

Horizontal ridges, also called “beau’s lines,” are abnormalities of the nail plate that appear as rumpling from the base to the tips of nails and are characterized by poor nail structure of both fingernails and toenails.

The nail plate is the hard keratin cover of the finger tip and toe tip which we ordinarily call “nails.” The nail plate is produced by the nail matrix. 

Q: Why do Beau’s lines develop in nails?

A: Beau’s lines occur due to temporary cessation of proliferation (growth) of proximal nail matrix at the nail base. As the finger nail grows at the rate of 0.1 mm/day, the time course of the illness can be estimated from the position of the Beau’s line from proximal nail fold.1

Nail Anatomy. Nail Anatomy. A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.org.

A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.

Beau’s lines are frequently seen in nutritional deficiency states, bacterial illness, acute stress, and systemic disease. The conditions where Beau’s lines have been described include severe systemic illness, chemotherapy, malnutrition, zinc deficiency, trauma, paronychia, pemphigus, and Kawasaki disease.2 Beau’s lines are commonly seen in patients undergoing chemotherapy.3

 This condition of nails was named after Joseph Honoré Simon Beau (1806-1865).

What Are Horizontal Nail Ridges In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Naik GS1, Harikrishna J. Beau’s lines. Indian J Med Res. 2013 Jan;137(1):220. [↩]
  2. Naik GS1, Harikrishna J. Beau’s lines. Indian J Med Res. 2013 Jan;137(1):220. [↩]
  3. Patel LM, Lambert PJ, Gagna CE, Maghari A, Lambert WC. Cutaneous signs of systemic disease. Clin Dermatol. 2011 Sep-Oct;29(5):511-22. doi: 10.1016/j.clindermatol.2011.01.019. [↩]

Koilonychia (Washboard Nails)

Koilonychia (Hordinsky, Sawaya, and Scher, 2000)

What Is Koilonychia?

[dropcap]K[/dropcap]oilonychia is a feature of an iron deficiency state characterized by abnormally shaped nails, called spoon shaped nails, meaning that the normal downward curve is reversed.

Depending on the inadequacy of iron, nails may simply remain flat or with a slight dip without progressing to a reversed curve.

These nails develop vertical ridges from the base to the nail tip that can become deep, called washboard nails.

Q: Are all nails affected?

A: All nails are affected in varying degrees. The small finger shows the least effect while the thumb shows the greatest change which begins as flattening before scooping upward.

Nail Anatomy. Nail Anatomy. A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.org.

A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.

What Is Koilonychia In Celiac Disease and/or Gluten Sensitivity?

Nails, Splinter Hemorrhages In

The tiny brown streak is a splinter hemorrhage.
The tiny brown streak is a splinter hemorrhage.

What Are Splinter Hemorrhages In Nails?

[dropcap]S[/dropcap]ubungual (under the nail) splinter hemorrhage is characterized by fragility of the underlying capillaries resulting in bleeding under the nail . Bleeding that results looks like a brown streak or splinter.1

Because the streak of blood is not in the nail but under the nail, it does not grow out with the nail. It can be a feature of vitamin C deficiency which resolves with adequate nutrition.

Nail Anatomy. Nail Anatomy. A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.org.

A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.

Splinter hemorrhage can be seen in a diet poor in vitamin C, disorders of food absorption, systemic disease such as psoriasis, nail lichen planus, an aggressive disease that may destroy the nail plate, and endocarditis. Some drugs, such as oral contraceptives, cause vitamin C deficiency.

Who is Affected in the General Population? Both sexes are commonly affected, though it occurs significantly more frequently in males. Where present in females, they were confined to a single digit.2

What Are Splinter Hemorrhages In Nails In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. Krause’s Food, Nutrition, & Diet Therapy. 10th Edition. Kathleen Mahan, Sylvia Escott-Stump. 2000. W.B. Saunders Company. [↩]
  2. Monk BE. The prevalence of splinter haemorrhages. Br J Dermatol. 1980 Aug;103(2):183-5. [↩]

Nails, White Spots And White Bands

This White Spot Is A Feature of Zinc Deficiency.
This White Spot Is A Feature of Zinc Deficiency.

What Are White Spots And White Bands In Nails?

[dropcap]W[/dropcap]hite spots in the nails is a feature of zinc deficiency and white bands signify protein deficiency characterized by abnormal appearance anywhere in one or more nails.

White spots and bands can appear separately or together in nails. There may be just one mark or many marks depending on the level of deficiency.

Q: What part of the nail is affected by zinc and/or protein deficiency?

A: Zinc and protein deficiencies affect the nail plate.

The nail plate is the hard keratin cover of the finger tip and toe tip, simply called “the nail.” The nail plate is produced by the living nail tissue at its base. Here is an illustration of the parts that make up a fingernail:

Nail Anatomy. Nail Anatomy. A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.org.

A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.

What Are White Spots And White Bands In Nails In Celiac Disease and/or Gluten Sensitivity?

Nails, Rounded With Curved Ends

Nail Anatomy. A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikipedia.org
Nail Anatomy. A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin. Courtesy Wikimedia.org

What Are Rounded Nails With Curved Ends?

[dropcap]R[/dropcap]ounded, curved, dark and dry nails are a well known feature of vitamin B12 deficiency.

Q: How does vitamin B12 deficiency cause the nails to grow this way?

A: Vitamin B12 deficiency affects the nail plate. The nail plate is the hard keratin cover of the finger tip and toe tip, simply called “the nail.” The nail plate is produced by the living nail matrix at its base.

What Are Rounded Nails With Curved Ends In Celiac Disease and/or Gluten Sensitivity?

Hangnail

Hangnail on lowest finger. Courtesy Wikipedia.org
Hangnail on lowest finger. Courtesy Wikipedia.org

What Is Hangnail?

[dropcap]H[/dropcap]angnail is a broken strip of epidermis (piece of skin) at root or lateral (side) edge of fingernail or toenail that causes sharp pain.

A hangnail develops because the skin around the nail is unhealthy due to inadequate nutrition. Injury from trauma including biting the skin and pushing back the cuticles or exposure to excessive detergents and water that remove protective oils promote the development of hangnail.

All ages and both sexes can be affected.

Q: Can a hangnail become infected?

A: Infection, called paronychia, may develop from invasion of sore skin by any of these pathogens: bacteria, fungus, or yeast (Candida). Infected skin is red, swollen, and painful. Topical ointment is required to treat the infection.1

What Is Hangnail In Celiac Disease and/or Gluten Sensitivity?

Sources:
  1. www.nlm.nih.gov/medlineplus/ency/article/001444.htm [↩]

Koilonychia: definition

A feature of an iron deficiency state characterized by abnormally shaped nails, called spoon shaped nails, that reverse the normal downward curve and have vertical ridges that can become deep, called washboard nails. Click for full description.