Nail pitting is a common symptom of psoriasis, a chronic autoimmune disease that affects the skin and nails. It occurs due to abnormal cell turnover in the nail matrix.
Chronic eczema, particularly when it affects the fingertips, can lead to nail pitting. The inflammation associated with eczema can disrupt nail growth and cause pitting.
This autoimmune condition primarily causes hair loss, but it can also result in nail abnormalities, including pitting.
Certain connective tissue disorders, such as rheumatoid arthritis and systemic lupus erythematosus, can lead to nail pitting as a result of inflammation and immune system dysfunction.
Fungal or bacterial infections that affect the nail bed can cause nail pitting. Fungal infections like onychomycosis can lead to pitted and discolored nails.
Physical trauma to the nail matrix, such as a crush injury or repeated pressure, can result in irregular nail growth and pitting.
In some cases, deficiencies in nutrients like zinc, iron, or biotin can contribute to nail abnormalities, including pitting.
Nail pitting can run in families, indicating a genetic predisposition to this nail condition.
Exposure to certain chemicals, irritants, or toxins over an extended period may affect nail growth and cause pitting.
Certain skin conditions, such as lichen planus or Reiter's syndrome, can manifest in nail changes, including pitting.