Aluminum phosphide poisoning can cause horizontal nail grooves and hair loss.
11 citations
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November 2005 in “The Journal of Dermatology” A man's crushed thumb caused unusual horizontal nail ridges on all fingers of one hand.
7 citations
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June 2021 in “JAAD Case Reports” A woman had hair loss, nail changes, and skin peeling after a COVID-19 infection, which got better on their own.
1 citations
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March 2024 in “Pathogens” Beau's lines on nails may indicate severe COVID-19 or vaccination response.
2 citations
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August 2022 in “Cutis”