Beauvais disease, also known as Beau's lines or Beau's illness, is a condition that affects the appearance of one's fingernails. These lines or grooves occur across the nails and are typically a result of a temporary disruption in nail growth. However, it is essential to note that Beauvais disease is not an actual disease but rather a symptom observed in various health conditions. Synonyms for Beauvais disease could include nail groove deformity, transverse depression of the nails, or onychomadesis. It is crucial to identify the underlying cause of Beauvais disease to provide appropriate treatment and alleviate any associated symptoms.