Ridges running vertically down the natural nail plate are caused by:

Ridges running vertically down the natural nail plate are commonly associated with uneven growth and the natural aging process. As we age, the rate of nail growth can slow down, and this can result in the formation of vertical ridges. These ridges are often an indication that the nail matrix is experiencing changes, which can be influenced by a variety of factors including hormonal changes, nutrition, and overall health.

While other conditions such as nail biting or treatment with medications could potentially affect nail appearance, they do not specifically lead to the characteristic vertical ridges that are primarily linked to the aging process and health-related factors impacting nail growth. Therefore, recognizing the connection between aging and uneven nail growth is essential for understanding the presence of vertical ridges in the nail plate.