External Signs of Internal Problems

If You Crossed the Line

Beau’s lines are indents across the nail. They result from a sudden interruption of nail keratin synthesis and grow horizontally with the nail plate. These lines can occur after illness, injury to the nail or malnutrition. They may indicate uncontrolled diabetes or vitamin or mineral deficiencies. They may also be a result of fever, pneumonia or other illnesses.

Reviewed by: 
Review Date: 
May 13, 2015

Last Updated:
May 14, 2015