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Onycholysis (Nail Separation)

Painless detachment of the nail plate from the underlying nail bed starting at the distal free edge or lateral border with white-yellow discoloration.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Dermatoloji department. Book Appointment →

What is Onycholysis (Nail Separation)?

Onycholysis refers to painless distal-to-proximal separation of the nail plate from the underlying nail bed, producing a white opaque appearance from air interface and risk of secondary fungal or bacterial colonization of the cavity.

Causes are diverse — trauma (manicures, occupational), fungal infections (onychomycosis), psoriasis, thyroid disease (hyperthyroidism), photoallergic reactions to medications (tetracyclines, fluoroquinolones, psoralens), iron deficiency anemia, and exposure to chemicals.

Diagnosis is clinical with adjunctive nail clipping for fungal culture, KOH preparation, or PCR; bilateral involvement of multiple nails suggests systemic cause whereas single nail involvement suggests trauma or onychomycosis.

Symptoms

White or yellow nail plate separation distally
Painless smooth detachment from nail bed
Greenish discoloration with Pseudomonas
Most often involves fingernails and great toenail
Possible thickening or dystrophy with fungal cause
Pitting, oil drop sign with psoriasis
Multiple nail involvement suggests systemic cause

Risk Factors

Repetitive trauma and aggressive manicures
Onychomycosis (fungal infection)
Psoriasis with nail involvement
Thyroid disease (hyperthyroidism, hypothyroidism)
Photosensitizing medications (tetracyclines, psoralens)
Iron deficiency anemia
Chemical exposure (cleaners, solvents, nail polish removers)

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Persistent nail separation despite trauma avoidance
  • Multiple nail involvement
  • Suspected fungal or psoriatic cause
  • Symptoms of thyroid disease
  • Greenish discoloration suggesting Pseudomonas
  • Concerns about systemic cause
  • Cosmetic distress affecting quality of life

Treatment Methods

01
Identification and removal of underlying cause
02
Keep affected area dry and trim detached portion
03
Avoid trauma — short nails, gloves for wet work
04
Topical or oral antifungals if onychomycosis
05
Topical corticosteroids or vitamin D analogs for psoriasis
06
Treatment of underlying thyroid disease
07
Discontinuation of causative medications

Which Department to Visit?

You can visit our Dermatoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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You can make an appointment with our specialists or contact us for your concerns.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.