India, March 9 -- An Ohio mother-of-two made a crucial health discovery after spotting black lines on her thumb during a routine nail appointment, as reported by Daily Mail.

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Michelle Tagliamonte, 58, first observed the faint lines running across her right thumb in September 2024, shortly before her monthly manicure. The health coach and nutrition educator initially dismissed them, assuming they would grow out.

"The first time I noticed it [the mark] was in September," Tagliamonte recalled. "I usually get my nails done every four weeks, so I don't know how long it had been there. My nails grow quickly because I have really good...