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A member asked:
I recently noticed raised horizontal ridges that run across my fingernails in a crescent moon shape same color as my nail. what causes this?
5 doctors weighed in across 2 answers
Beaus lines: Interruptions in the nail growth plates cause these horizontal ridges. Usually due to severe illness a few months ago.
Answered 1/25/2020
5.6k views
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Unsure: Horizontal nail ridges (or Beau’s lines) run across nail & might be signs of diabetes, thyroid disease, kidney disease. They may occur in people who had syphilis or muscles or who had chemotherapy. These should be evaluated.
Answered 11/2/2018
254 views
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