Introduction As babies grow up, they will inevitably develop some minor problems, the most common of which is diarrhea. Diarrhea is a common problem for babies one and a half years old, because the baby\’s immune system has not yet fully developed and is easily infected with various bacteria or viruses. Once the baby has diarrhea, prompt measures should be taken to treat it as soon as possible to avoid worsening of the condition. Causes of Baby Diarrhea The causes of baby diarrhea are varied. First of all, the baby\’s gastrointestinal system is not fully mature and is susceptible to external contamination and infection. Secondly, the baby’s dietary needs gradually increase,