Chevron nail, also known as a herringbone nail, is a rare transient fingernail ridge pattern seen in children, a ridge arising from the proximal nailfold and converging in a V-shaped pattern towards the midpoint distally.[1]: 786 The nail growth pattern has no known association with medical problems and tends to resolve by early adulthood.[2]
John, Jonathan Mathew; Mathew, Deepa Elizabeth; John, Cheri Mathews (2024-04-16). "Chevron nail: an under-recognised normal variant of nail development". Archives of Disease in Childhood. BMJ: archdischild–2024–326975. doi:10.1136/archdischild-2024-326975. ISSN0003-9888. PMID38627027.