Babies who are still not walking at 18 months of age are mostly caused by high or low muscle tone. Most of these babies are born with cerebral retardation and have high risk factors before, during or after birth, such as prematurity, low birth weight, hypoxic-ischemic encephalopathy, hypoglycemia, multiple births, in vitro fertilization, etc. The inability to walk will be accompanied by symptoms such as pointed feet when standing, scissor crossed stiffness of both lower limbs, or muscle strength of both lower limbs that cannot be supported, arch collapse and foot exostosis when standing. If you have any of the above symptoms and medical history, you should go to the doctor for evaluation and, if necessary, give professional comprehensive rehabilitation treatment.