Symptoms of calcium deficiency in six-year-old children mainly include emotional irritability, anorexia, picky eating, and difficulty in sleeping at night. Symptoms of calcium deficiency in six-year-old children vary from person to person. Some children may be emotionally irritable, anorexic and picky eaters. Some children may have poor concentration, fatigue, decreased body resistance, sleeplessness, delayed dental development, and if the situation is more serious, it may lead to rickets and other diseases. Usually must observe the children’s physical condition, if found to have obvious abnormal reaction, it is recommended to take the children to the doctor for examination in a timely manner, after a clear diagnosis for targeted treatment. In addition, the baby usually should be balanced nutrition, strengthen exercise and pay attention to rest.