Patient's question:
My friend's baby hasn't been eating milk well recently and has been vomiting like that. Additionally, their bowel movements have only been once every few days. So, they took the baby for a thorough examination, and the doctor later diagnosed it as phenylketonuria. What are the earliest symptoms of phenylketonuria?Doctor's answer:
Phenylketonuria in its early stages manifests as nausea, irritability, restlessness, and varying degrees of growth and development delays. By the age of four to nine months, infants begin to show significant intellectual development delays and severe language growth and development impairments. Over half of the children may also experience recurrent epilepsy, with one-third of them redeveloping infantile spasms, typically occurring before the age of eighteen months.