What is the primary trigger for nail pitting?

• A. Psoriasis
• B. Nail trauma
• C. Allergies
• D. Infections

Answer: (A)

Nail pitting is primarily associated with psoriasis, a chronic autoimmune skin condition. In individuals with psoriasis, the immune system mistakenly attacks healthy skin cells, leading to inflammation and abnormalities in skin and nail growth. This disruption in the normal formation of the nail matrix—the area where nail growth originates—results in small depressions (or pits) on the surface of the nails.

The pitting can vary in size and depth and is a common characteristic among those with psoriasis. While other conditions such as trauma, allergies, or infections might affect the nails, they do not typically lead to the characteristic pattern of pitting seen in psoriasis. Nail trauma may cause irregularities or lines, allergies might induce changes in texture or color, and infections can lead to other nail disorders, but none of these are the primary cause of pitting. Therefore, psoriasis remains the most recognized trigger for this specific nail condition.