“Four major signs of calcium deficiency” is not a good idea, different age groups, different individual calcium deficiency of the specific performance there can be a big difference, it is difficult to summarize into four. 1. Calcium deficiency in infants and young children: common irritability, spontaneous sweating (involuntary sweating during the day, a little sweat aggravated by movement), night cries and easy to frighten, hands and feet tugging, yellow hair, anorexia, paroxysms of abdominal pain, late teething, late toddler and other growth retardation, and prone to colds, pneumonia and immune deficiency caused by disease, treatment is not timely, then there will be the performance of the square skull, chicken breasts, O- or X-shaped legs, and so on. 2. Calcium deficiency in adults: it is mainly manifested as growing pains, leg cramps, weakness of lower limbs, easy fatigue, lack of energy, partiality, osteoporosis, and so on, and in serious cases, skeletal deformities can occur. In summary, the clinical manifestations of calcium deficiency vary from person to person, and it is impossible to summarize the most common so-called “four signs”. The specific diagnosis and treatment of this disease must be completed by a professional doctor, do not blindly judge and dispose of it on your own, so as not to cause adverse consequences.