Beau's traces: Deep grooves throughout the nail's width suggest the nails have slowed or stopped developing. Accidents, chemotherapy, large pressure, and fever may cause Beau's strains. Brown-black discolorations about the nail may mean there is melanoma pores and skin cancer over the skin underneath the nail. For those who see https://byd61368.designertoblog.com/67137515/5-simple-techniques-for-nail