My daughter is just one and a half months old and often has difficulty breathing, sometimes with purple lips and face. The doctor diagnosed it as gastroesophageal sphincter relaxation and did not provide treatment, saying it would get better as she grows older. However, since yesterday, the child has been vomiting severely, almost unable to eat. Is this dangerous? I’m not sure if the child is still vomiting. There are many causes of infant vomiting. They can be internal medicine conditions (such as gastroesophageal reflux, delayed gastroesophageal sphincter relaxation, pyloric spasm, enteritis, etc.), or surgical conditions (such as hypertrophic pyloric stenosis, gastric torsion, diaphragmatic hernia, malrotation of the intestines, etc.). If the vomiting is severe and persistent, with vomit containing bile and feces, and affecting the child’s growth, it is often a surgical issue. Different causes of vomiting require different treatment approaches. It is recommended to undergo a detailed examination at a specialized hospital and treatment based on the examination results. These are the suggestions for the question ‘Dealing with Pediatric Gastroesophageal Sphincter Relaxation’. Hope this helps, and wish you health!