Dizziness in children is not necessarily caused by calcium deficiency, but it may be present when calcium deficiency is severe and hypocalcemia is present. Most of the symptoms of calcium deficiency in children are cramps, fatigue, excessive sweating and back pain. However, if calcium deficiency causes hypocalcemia, it will easily lead to blockage of myocardial conduction, cardiac arrhythmia as well as induce ventricular fibrillation and other problems, which will have an impact on the pumping function of the heart, causing the brain to suffer from lack of oxygen and blood, and dizziness will appear as a symptom. There are many reasons that can cause dizziness in children, such as hypertension, febrile illness, craniocerebral trauma syndrome, anemia, and neurological disorders. Therefore, it is recommended to take the child to the hospital for examination in a timely manner and give symptomatic treatment after a clear diagnosis.