What happened to the finger vertical lines?

The finger will not show vertical lines, so the finger showing vertical lines usually refers to the fingernail showing vertical lines, this situation is likely to be excessive overwork and excessive use of the brain, coupled with frequent stay up late, resulting in insufficient sleep, thus leading to the finger showing vertical lines, this time should be appropriate to reduce the working time, and to ensure that there is enough sleep every day. Fingernail cover shows vertical lines may also be due to long-term consumption of instant noodles and other fast food, resulting in a lack of vitamins or calcium elements in the body, so that the nail cover vertical lines show, at this time should eat more fruits and vegetables, drink more milk, so as to prevent vertical lines on the fingernail.