May be autoimmune: Yes, this could be a sign of autoimmune diseases.
Answered 11/21/2012
5.5k views
Probably not.: I've never seen lupus cause horizontal nail ridges, although i suppose it's possible. Certain medications can do it, as can diabetes and certain systemic diseases. If you're not on any medications, your doctor may wish to extend the workup to look for other internal causes, besides lupus.
Answered 4/1/2019
5.5k views
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