Pitted Nails: What the Dents Say About Skin and Joint Disease

Pitted nails—small dents or depressions on the nail surface—can be more than a cosmetic concern. While a single dent might follow an injury, multiple pits often point to underlying skin or joint conditions. Understanding what these nail changes mean can help you seek timely care and manage any related health issues.

What Are Pitted Nails?

Pitted nails appear as tiny, shallow dents on one or more fingernails or toenails. They vary in:

• Number: from a few scattered pits to dozens across the nail plate
• Size and shape: round or irregular depressions, typically 0.5–1 mm deep
• Location: central, peripheral, or spread evenly

Healthy nails grow smoothly because the nail matrix (the skin under the cuticle) lays down uniform layers of keratin. When the matrix is damaged or inflamed, it produces pits.

Common Causes of Pitted Nails

Several skin and joint diseases can disrupt the nail matrix, leading to pitting:

1. Psoriasis

• Frequency: Up to 50 % of people with psoriasis develop nail changes.
• Features: Nail pitting, thickening, discoloration, “oil-drop” spots.
• Why it happens: Inflammation in the skin often extends to the nail matrix.

2. Psoriatic Arthritis

• Overlap with psoriasis: Joint pain and swelling accompany skin and nail symptoms.
• Nail signs: More severe pitting, onycholysis (nail separation), subungual debris.
• Red flag: New joint pain plus nail changes warrants medical evaluation.

3. Alopecia Areata

• Autoimmune hair loss: Patches of baldness on the scalp or body.
• Nail involvement: Roughened surface, pitting, transverse ridges.
• Pattern: Often fine, shallow pits; may occur before or after hair loss.

4. Eczema (Dermatitis)

• Chronic skin inflammation: Itchy, red, scaly patches.
• Nail effects: Pitting is less common than in psoriasis but can occur in chronic cases.
• Triggers: Allergens, irritants, stress.

5. Reactive Arthritis (Reiter’s Syndrome)

• Following infection: Usually after gastrointestinal or genitourinary bacterial infection.
• Nail findings: Pitting, thickening, discoloration; often with keratoderma blennorrhagicum (skin lesions on palms/soles).
• Symptoms: Joint pain, conjunctivitis, urinary issues.

6. Other Causes

• Sarcoidosis: Rare, granulomas in various organs; nail pits can appear with chronic lesions.
• Lichen planus: Inflammatory condition affecting skin, mucous membranes; may cause pitting and grooves.
• Trauma or repetitive injury: Biting, picking, or pressure can mimic pitting but typically affects only one or two nails.

When to Be Concerned

Small, isolated dents after an injury aren’t usually worrisome. Seek medical attention if you notice:

• Multiple nails affected
• New or worsening nail pits without clear cause
• Accompanying skin rashes, joint pain or swelling
• Nail discoloration, thickening, or separation
• Signs of infection (redness, warmth, pus)

Early recognition of associated conditions—especially psoriasis and psoriatic arthritis—can prevent joint damage and improve outcomes.

Diagnosis and Evaluation

A healthcare provider will:

1. Review your medical history
2. Examine your skin, nails, joints and scalp
3. Ask about family history of psoriasis, arthritis or autoimmune disease
4. Perform blood tests or imaging if joint involvement is suspected
5. Consider a nail biopsy in unclear cases

Accurate diagnosis is key to tailoring treatment and preventing complications.

Treatment Strategies

Managing pitted nails involves addressing the underlying condition and caring for the nails themselves.

Treating the Underlying Disease

• Psoriasis/psoriatic arthritis:
  • Topical corticosteroids or vitamin-D analogs for mild cases
  • Systemic therapies (methotrexate, biologics) for moderate to severe disease
• Alopecia areata:
  • Topical or intralesional steroids
  • Topical immunotherapy
• Eczema:
  • Emollients, topical steroids or calcineurin inhibitors
  • Allergen avoidance
• Reactive arthritis:
  • NSAIDs for joint symptoms
  • Antibiotics if an active infection is identified

Nail Care Tips

• Keep nails trimmed and filed smooth
• Protect nails from trauma (gloves for chores)
• Avoid nail biting or picking
• Moisturize cuticles and nail folds regularly
• Use gentle, fragrance-free nail products

Patience is important—nails grow about 2–3 mm per month, so improvement may take several months.

Self-Assessment and Next Steps

Not sure what’s causing your pitted nails? Consider a free, online symptom check, using the doctor approved Ubie Symptom Checker to guide your next steps. Try it here.

This tool can help you:

• Identify possible causes based on your symptoms
• Decide whether you need to see a specialist
• Prepare questions for your doctor’s visit

When to See a Doctor

Always discuss nail changes with a healthcare professional if you experience:

• Rapidly worsening symptoms
• Joint pain, stiffness or swelling
• New skin rashes, eye redness or urinary symptoms
• Signs of infection around the nail

If you have any life-threatening or serious concerns—high fever, severe pain, spreading redness—seek emergency care immediately.

Key Takeaways

• Pitted nails are small dents in the nail plate often linked to skin or joint diseases.
• Psoriasis, psoriatic arthritis, alopecia areata and eczema are among the most common causes.
• Multiple affected nails, joint pain, skin rashes or infection signs warrant medical evaluation.
• Treatment targets both the underlying condition and nail care.
• Monitor nail growth and give treatments time to work—improvement can take months.

Speak to a doctor about any nail changes you find worrisome, especially if they’re accompanied by other symptoms. Early diagnosis and treatment can protect your skin, joints and overall health.