1.There is a "occipital bald ring": children who are deficient in calcium are prone to sweating, and their heads are itchy due to sweating after falling asleep, and they will continue to rub the pillow.
2."Easy to startle, restless sleep, crying at night": children with calcium deficiency have high nervous excitability, which is manifested as easy to startle, restless sleep, and often wake up suddenly at night and cry incessantly.
3.Late teething: Calcium deficiency in children after 1 year of age is manifested by late teething, and some children do not have teeth until 1 and a half years old.
4.Head abnormality: delayed closure of the anterior fontanelle. Under normal circumstances, the average age of a baby's anterior fontanelle closure is 18 months, and children with calcium deficiency often do not close after 1 and a half years of age, and even have manifestations of skull malacia.
5.Lower limb abnormalities: mainly manifested as lower limb curvature, that is, X-shaped legs, O-shaped legs, etc. When the child's calcium deficiency is severe, it can soften the bones, and when standing, due to the weight of the body, the lower limbs are bent, forming the so-called X-shaped legs, O-shaped legs, etc., and some are even prone to fractures.
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Chest abnormalities: Thoracic deformities, such as sternal lordosis, narrow and bulging chest, which is often referred to as "chicken breast", and costal margin valgus.