The disease of cold damage, with a pulse that is faint and rough, was originally cholera, but now it is cold damage disease. After four or five days, it reaches the yin meridians and turns into yin, which will inevitably lead to diarrhea. If there is vomiting and diarrhea, it cannot be treated. If there is a desire to defecate but only gas is passed, and there is still no diarrhea, this belongs to the Yangming meridian, and the stool will definitely be hard. It will heal in thirteen days. The reason for this is the end of meridian transmission. After diarrhea, the stool should become hard. If it becomes hard and the patient can eat, they will recover. If they still cannot eat, but after passing through the next meridian, they can eat a little, and after passing through another meridian, they can eat, then they should recover in one day. If they do not recover, it does not belong to the Yangming meridian.