《黄帝内经·素问·标本病传论》
肾病则先小腹、腰脊疼痛，小腿发酸，三日后病邪传入膀胱，发生背脊筋骨疼痛，小便不通；再过三日病邪传入于胃，产生腹胀；再过三日病邪传于肝，发生两胁胀痛；再过三日不愈，就要死亡；冬天死于天大亮，夏天死于黄昏。
肾病少腹腰脊痛、胻酸，三日背𦛗筋痛、小便闭，三日腹胀，三日两胁支痛，三日不已，死，冬大晨，夏晏晡。
The initial onset of kidney disease is pain in the lower abdomen, lower back and spine, and leg cramps; after three days, the pathogenic factor will spread to the bladder, causing pain in the glutes, spine and bones, and urination issues; if it is not cured after three more days, the pathogenic factor will spread to the stomach, causing bloating; after three more days, the pathogenic factor will spread to the liver, causing pain and bloating in the ribs; if it is not cured after another three days, death will occur; in the winter, death will occur at daybreak, and in the summer, death will occur at dusk.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 肾病少腹腰脊痛、胻酸，三日背𦛗筋痛、小便闭，三日腹胀，三日两胁支痛，三日不已，死，冬大晨，夏晏晡。 [/INST] The initial onset of kidney disease is pain in the lower abdomen, lower back and spine, and leg cramps; after three days, the pathogenic factor will spread to the bladder, causing pain in the glutes, spine and bones, and urination issues; if it is not cured after three more days, the pathogenic factor will spread to the stomach, causing bloating; after three more days, the pathogenic factor will spread to the liver, causing pain and bloating in the ribs; if it is not cured after another three days, death will occur; in the winter, death will occur at daybreak, and in the summer, death will occur at dusk.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 肾病少腹腰脊痛、胻酸，三日背𦛗筋痛、小便闭，三日腹胀，三日两胁支痛，三日不已，死，冬大晨，夏晏晡。
user
The initial onset of kidney disease is pain in the lower abdomen, lower back and spine, and leg cramps; after three days, the pathogenic factor will spread to the bladder, causing pain in the glutes, spine and bones, and urination issues; if it is not cured after three more days, the pathogenic factor will spread to the stomach, causing bloating; after three more days, the pathogenic factor will spread to the liver, causing pain and bloating in the ribs; if it is not cured after another three days, death will occur; in the winter, death will occur at daybreak, and in the summer, death will occur at dusk.
assistant