If a four-year-old baby has an unsteady gait, you need to consider whether there are lesions in the nervous system, bones and muscles. 1. Neurological lesions: unsteady gait in four-year-olds may be caused by lesions in the central or peripheral nerves, such as Miller-Fisher syndrome, brain tumors and other diseases, which can make children have unsteady gait. 2. Bone and muscle lesions: when bone and muscle lesions, can also appear unsteady gait, such as rickets, progressive muscular dystrophy and other diseases, but the children’s bone and muscle dysfunction, resulting in walking abnormalities such as unsteady gait. Four-year-old baby walking unsteadily, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.