Introduction: Calcium deficiency is one of the most common diseases in children, which will have a great impact on the growth and development of children. Parents should pay close attention to their children\’s dietary health, promptly detect symptoms of calcium deficiency, and provide timely treatment and calcium supplementation to ensure the healthy growth of their children. Symptom 1: Growth retardation One of the most obvious symptoms of calcium deficiency is growth retardation. Under normal circumstances, children can grow about 5 to 8 centimeters per year. If the child finds that the height growth rate is