If the baby’s forehead skull is more prominent, after excluding genetic factors, we should consider whether the baby has a history of calcium deficiency. If the calcium deficiency is not supplemented in time, it will lead to the baby’s skull developing into a square skull, with the forehead skull protruding and both sides of the skull being square shaped. Parents should not worry too much about this situation, adjust their mindset and take the baby to the hospital for examination in time, so that the baby can eat more food containing calcium and let the baby sunbathe more to increase the absorption of calcium, while giving the baby calcium supplements. Calcium is generally better absorbed in an acidic environment, so parents can give their babies acidic calcium such as calcium gluconate, calcium lactate, with vitamin AD drops, while to promote the absorption of calcium.