《黄帝内经·素问·咳论》
肺咳不愈，则大肠受病；大肠咳的症状，咳而大便失禁。
肺咳不已，则大肠受之。大肠咳状，咳而遗失。
If the lung cough is not cured, then the large intestine will be affected; the symptoms of large intestine cough: coughing and incontinence of stool.