A Answers (1)
Dents and grooves on fingernails and toe nails can be caused by several things including stress, vitamin deficiencies, and cysts from arthritis.
It depends on the exact characteristics and appearance of the nail. One of the most common problems I see in my practice is a deep groove in the fingernail accompanied by a large cyst over the end joint of the finger, near the nail.
The cyst puts pressure on the tissue that the nail grows from and causes changes in nail appearance. The groove resolves when the cyst goes away.
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