expression, godan verb (-tsu)
have a guilty conscience; have a skeleton in the closet
Idiomatic expression literally meaning 'to have a wound on one's shin,' implying one has a past misdeed or secret that makes them feel uneasy or vulnerable.
彼は脛に傷持つのか、その話題になると急に黙り込んだ。
Maybe he has a guilty conscience; he suddenly fell silent when that topic came up.
Everyone has a skeleton or two in their closet.