nephralgia
  腎痛
  ne·phral·gia /nɪˈfrælʤə/ 名詞
  腎痛
  Ne·phral·gi·a Ne·phral·gy, n.  Med. Neuralgia of the kidneys; a disease characterized by pain in the region of the kidneys without any structural lesion of the latter.
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  nephralgia
       n : pain in the kidney (usually felt in the loins)