The source covers four nail conditions — brittle nails, vertical ridges, white spots, and yellow discoloration — but the full clinical picture of nail health extends further, encompassing signs linked to cardiovascular conditions, autoimmune disorders, and chronic infections. For anyone whose nail changes are sudden, progressive, or paired with systemic symptoms such as fatigue or unexplained weight change, the next step is a consultation with a dermatologist or general practitioner who can order targeted tests, including thyroid panels or iron and biotin level assessments, to identify or rule out an underlying cause.
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