In contrast to Beau's lines, they are not grooved.

Beau's lines can also be seen one to two months after the onset of fever in children with Kawasaki disease.

Beau's lines should also be distinguished from Muehrcke's lines of the fingernails.

There are several causes of Beau's lines.

With this in mind the date of the stress causing Beau's lines and other identifiable marks on nails can be estimated.

Beau's lines: Transverse grooves on the nail plate, usually an indication of systemic disease.

Beau's lines are ridges in the nail.

Beau's lines are deep grooved lines that run from side to side on the fingernail.

One of his fingernails (of the two found) shows three Beau's lines indicating he was sick three times in the six months before he died.

It evaluates several signs separately, each on a 1-3 scale: pitting, Beau's lines, subungual hyperkeratosis and onycholysis.

Beau's lines are horizontal, going across the nail, and should not be confused with vertical ridges going from the bottom (cuticle) of the nail out to the fingertip.

At the nails Splinter hemorrhage and Quincke's pulsation should be looked for as well as any deformity of the nail such as Beau's lines, clubbing or peripheral cyanosis.

Deep transverse grooves known as Beau's lines may form across the nails (not along the nail from cuticle to tip) and are usually a natural consequence of aging, though they may result from disease.

While Beau's lines are actual ridges and indentations in the nail plate, Muehrcke lines are areas of hypopigmentation without palpable ridges; they affect the underlying nail bed, and not the nail itself.

A researcher found Beau's lines in the fingernails of two of six divers following a deep saturation dive to a pressure equal to 305 meters of sea water, and in six of six divers following a similar dive to 335 meters.