Final answer:
Indented vertical lines down the nail plate that may be caused by illness or injury are called Beau's lines.
Step-by-step explanation:
Indented vertical lines down the nail plate that may be caused by illness or injury are called Beau's lines. They are named after the French physician Joseph Honoré Simon Beau, who first described them. Beau's lines can occur due to a variety of health issues or injuries, such as nutritional deficiencies, infections, trauma to the nail, or systemic conditions like diabetes or thyroid disorders.
For example, if a person experiences a severe illness or undergoes chemotherapy, it can interrupt nail growth temporarily, leading to the formation of Beau's lines. Preventing Beau's lines involves maintaining good overall health, including a balanced diet and avoiding injury or trauma to the nails. If someone notices Beau's lines on their nails, it is essential to consult a healthcare professional to determine the underlying cause and receive appropriate treatment.