Dermatology - Beau Lines

Dermatology - Beau Lines 
Beau lines 
Beau lines occur when nail development is temporarily halted following a severe, abrupt, acute sickness, such as a medication reaction or in the presence of atopy, peripheral vasculitis, or ischemia. If all 20 nails are affected, it suggests the presence of a systemic disease. Typically, single nail involvement is the result of a stressful event.

The nails are affected by transverse depressions that reach from one side to the other, affecting all nails at the same level. If the length of the disease entirely halts the activity of the matrix for a period of 7-14 days, it leads to the formation of a transverse depression that causes the nail plate to totally separate (a condition known as onychomadesis). Chemotherapy can involve the use of numerous parallel lines.
Beau lines do not constitute a standalone diagnosis, but rather indicate an underlying or recent disease.
Beau lines will gradually go as the nail regenerates and any underlying ailment is addressed.
No specific management is needed.