are mild, symmetrical, and have developed gradually without other unusual changes, they are generally less concerning.
However, a sudden or dramatic change in the appearance of several nails deserves more
attention.
Horizontal Lines Can Have Different Causes
Horizontal grooves are different.
They can sometimes develop when nail growth is temporarily disrupted. A significant illness, high fever, major physical stress, injury, or certain treatments can interfere with normal nail growth.
These lines may appear weeks or months after the event that affected nail growth, meaning the nail itself can sometimes
