Suggestion: We must pay attention to the performance of calcium deficiency in 7-year-old children. You mentioned the problem of calcium deficiency in 7-year-old children, and I will answer it for you as follows. Whether the baby is short of calcium is a concern of many mothers. Once calcium is lacking, the baby's growth and development will be seriously affected. I made a self-test table, mothers, have a look! Calcium deficiency self-test table 1, fidgety, often crying for unknown reasons, not easy to fall asleep, even if asleep, it is easy to wake up; 2, sweating a lot, even if the weather is not very hot, it is easy to sweat; 3, occipital hair loss circle, hair loss often occurs in the back of the head; 4. Teeth are later than children of the same age; 5. The fontanel closes late and has muscle weakness; 6. The expression is dull, the expression is few, and the movements and language are behind the children at the same stage; 7, the forehead is high, forming a square skull. Or there are often beaded ribs, and each rib cartilage proliferates like beads, which often oppresses the lungs, making the baby poorly ventilated and prone to bronchitis and pneumonia; 8. Anorexia and partial eclipse are also related to calcium deficiency. Insufficient calcium intake in human body can easily lead to loss of appetite, mental retardation and decreased immune function; 9, eczema is also related to calcium deficiency, common in the top of the head, face, behind the ears, accompanied by crying anxiety, sweating behind the pillow and back; 10, severe calcium deficiency may even cause humpback and O-legs in chicken breast, which needs special attention. Next, it is best to go to the hospital for testing, so that the doctor can give the most authoritative judgment according to the baby's physical condition.