The causes of normal stool for the first time and diarrhea for the second time may be related to abdominal cold, dietary stimulation and bacterial infection.
1. Abdominal cold: If the abdomen is cold after the first normal stool, it can lead to a decrease in the ability of the intestinal mucosa to absorb water from the intestinal contents, so that the second discharge of excessive water in the stool, and the stool is thinner.
2. Dietary stimulation: after the first normal defecation, if you eat a lot of greasy, spicy and other stimulating food, intestinal peristalsis accelerated, the intestinal mucosa does not have time to absorb the water in the feces, it will be discharged in loose stools.
3. Intestinal infection: If the intestinal tract is infected by bacteria between the first and second bowel movements, causing acute enteritis, the inflammatory secretions secreted by the intestinal mucosa increase and are mixed into the second bowel movement, which can make the feces thinner.
There may be many other reasons why the first stool is normal and the second one is dilute. Abnormal stools need to be treated by a doctor in time, so that the cause can be clarified by a professional doctor and standardized treatment can be carried out.