The first normal stools, the second diarrhea is considered to be related to cold, infection and so on. 1. Cold: when the abdomen is cold, such as blowing air conditioning, fans, abdominal clothing is too little, too much cold food, etc., diarrhea can occur, usually diarrhea symptoms are not very serious, can be through the local hot compresses, drink more hot water to relieve the symptoms. 2. Infection: when eating unclean food, gastroenteritis can occur, thus causing diarrhea, can also be accompanied by abdominal pain, fever and other phenomena, need to go to the gastroenterology department to improve the fecal routine and other tests to clarify the diagnosis. Usually should pay attention to keep warm, pay attention to dietary hygiene, diarrhea symptoms aggravation should be timely medical care, under the guidance of professional physicians to clarify the cause of the disease, and treatment.