How old are babies usually when they can hold their heads up completely?

Patient's question:

No

Doctor's answer:

A three-month-old baby can lift their head up to a 90-degree angle when lying on their stomach, with relatively stable head lifting. When being supported in a seated position, the head leans forward, but it remains steady. So there's no need to worry too much; it's all about taking it slow. If the child cannot lift their head slightly after two months, then it's something to pay attention to.