1. Introduction Deep horizontal ridges across the fingernails, clinically termed Beau lines, indicate a temporary cessation of nail cell division in the nail matrix. This growth arrest is typically triggered by a significant physiological stressor, such as a severe systemic infection, profound nutritional deficiency, or localized trauma to the nail fold. Because nails grow at … Read more
1. Introduction and Direct Answer Deep horizontal ridges on the fingernails, medically recognized as Beau’s lines, are caused by a temporary, severe interruption in the cellular growth of the nail matrix. This growth arrest is typically triggered by a significant physiological stressor, such as a severe systemic infection with a high fever, a major surgical … Read more
1. Introduction If your fingernails develop deep horizontal ridges, it means that the cellular growth of the nail was temporarily arrested due to a severe systemic stressor, illness, or trauma. These transverse depressions, clinically known as Beau’s lines, serve as a historical physiological record of a period when the body diverted energy away from nail … Read more