Onychomadesis

The complete shedding or loss of a nail starting from the base near the cuticle.

Common causes:

• Viral infections: Hand, foot, and mouth disease, chickenpox, enteroviruses

• Physical trauma: Direct injury or crushing of the nail bed or matrix, tight footwear

• Medications: Chemotherapy, antiepileptics, retinoids

• Systemic illnesses: Fever, severe metabolic stress, Kawasaki disease, pemphigus vulgaris