Nail pitting

Multiple small, shallow to deep depressions of the nail plate surface caused by focal defective keratinization within the proximal nail matrix.

Causes

• Psoriasis

• Eczema (atopic dermatitis)

• Lichen planus

• Alopecia areata

• Sarcoidosis

• Pemphigus vulgaris

• Reactive arthritis (Reiter's syndrome)

• Incontinentia pigmenti

• Chronic nail matrix trauma