Question
The newborn weighs 8 jin and 1 liang, with a full fontanelle at birth that is unreachable, and purple nail beds, but otherwise appears normal. The detailed results of the blood test at birth were normal, and no treatment has been received. What could this be?
Answer
The fontanelle (anterior fontanelle) is a diamond-shaped gap formed between the frontal and parietal bones. It measures about 1.5 to 2 centimeters at birth and gradually decreases in size as the brain develops, closing completely around 1.5 years of age. According to your description of the fontanelle being full and unreachable, it may be due to increased intracranial pressure, which can have various causes. It is recommended to bring the child to the hospital for a detailed examination to rule out any brain abnormalities.