One year old baby walking suddenly weak legs, may be viral myositis, brain injury, central nervous system developmental delay, calcium deficiency, etc. caused.
1. viral myositis: one year old babies in the first half of the soft legs more than a history of acute upper respiratory tract infections, caused by viral infections of the leg muscles, because the leg muscle infections will affect the function of the leg muscles can cause sudden leg weakness.
2. Brain injury: The causes of brain injury include viral infections, bacterial infections, traumatic brain injury, etc., which can affect brain function and cause leg weakness.
3. Delayed development of central nervous system: it is easy to have decreased muscle strength and muscle tone, resulting in one-year-old babies still have weak legs, often accompanied by retarded intellectual and fine motor development.
4. Calcium deficiency: a one-year-old baby walking suddenly weak legs may be caused by calcium deficiency.
A one-year-old baby walking suddenly soft legs may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause, give targeted treatment or standardized treatment.