Discuss how to address the issues of a baby refusing to eat and experiencing diarrhea, while also regulating spleen and stomach function and intestinal flora.

My baby has recently been experiencing coughing while eating, and it also happens occasionally in the morning. He would vomit out all the medicine when being fed. The amount he eats for meals is still good. I am very worried about what the cause might be. I hope an expert can help relieve my concerns.