Hello, I’m JaeHoon in South Korea.
I am reading the book, “Sometimes they come back”
But I don’t know some idioms(or not idioms) ,although merely problems in translations.
His fingers hurt very badly – What fingers? He would have to see a doctor.
I don’t understand the meaing of “What fingers” .
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I don’t know-- I need more context. ‘What fingers?’ without further context means that he does not see/feel any fingers. Did he perhaps just lose his fingers in an accident?
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Sounds very plausible, MM. 
Or perhaps the pain was so excruciating that he really couldn’t tell which fingers were hurting and which not.
Tom
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Then it would be ‘Which fingers?’-- as you said, Tom!
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It sounds to me like he had lost his fingers or hand(s) but still felt the phantom pain…