Article in English: Not all babies are the same, so don’t be alarmed if your baby isn’t walking at a certain age. The time it takes for a baby to reach a particular milestone, like walking, can vary due to different body weights or even different personalities. Keep in mind a walking timeline is an approximation and not set in stone or an absolute requirement for every baby.  Some babies who are born prematurely may have more trouble reaching milestones at the same rate as other children born at full-term.  As well, sometimes babies are just frightened of letting go of your fingers and taking their first steps. So it’s very important to encourage and support your baby as they learn to walk and not to put too much pressure or stress on them. In fact, it’s just baby fat plumping their feet up. By around age 2 to 3, that extra “fluff” on their feet should melt away and you should be able to see their natural arches. Their feet may also curve inward, appearing like half moons, which is another infant holdover. Over time, their feet should straighten out. Also commonly known as “toeing-in”, pigeon-toed feet come from an internal tibial torsion, meaning your baby’s shinbones are turned inward.  This will correct on its own within six months of your baby’s first steps. If your baby still has pigeon-toed feet after six months, ask your pediatrician about stretching exercises to correct the problem. Some babies will have a natural desire to walk around on their tiptoes, which actually helps them develop their sense of balance. This is almost always a quirk that will go away on its own, but rarely, it can be an indication of a too-tight muscle in your baby’s heels or feet. If your baby cannot physically flatten their feet on their own, or if they are walking on their tiptoes past the age of 3, let their pediatrician know, as this could be a sign of a developmental issue. There may be signs of possible nerve, joint, or spinal issues. As they gain more confidence and becomes more comfortable with walking on flat, smooth surfaces, allow them...

Summary in Vietnamese:
Không nên so sánh sự phát triển của con bạn với những em bé khác. Đừng quá lo lắng nếu bạn thấy chân bé trông như bị tật bàn chân phẳng. Chắc rằng bàn chân quặp vào trong của bé sẽ tự ngay ngắn lại. Kiểm tra chân bé để chắc rằng chúng thẳng. Trao đổi với bác sỹ nhi khoa nếu con bạn ngã nhiều hơn bình thường, chân trẻ có vẻ khó uốn hay bé cứ bị ngã về một phía. Để trẻ khám phá dần khi đã bắt đầu thoải mái hơn với việc đi.