Black vertical lines on nails

Black vertical stripes can be divided into two cases, one is a non-disease, may be caused by trauma extrusion caused by capillary bleeding in the lower part of the nail, the other may be caused by accidental scratches on the nail surface during the manicure process. Recently, there are also life stress, overwork, irregular work and rest time, and long-term lack of nutrition, all of which will show different degrees of black vertical stripes on the nail.