Severe bone strength deficiency, which usually occurs in small children as well as in older people, is a more serious condition. When this disease occurs, the child’s bones are altered and become unstable because of severe calcium deficiency, which may cause the child to develop curvature of the limbs. Moreover, the child may have flattened vertebrae due to compression of osteoporotic bones, causing the height of the vertebrae to become shorter, which in turn may lead to fracture or hunchback condition, and this phenomenon will become more and more serious as the child grows older and the bones will be more and more altered. If the patient has severe bone strength deficiency, fractures may occur when turning over or coughing, especially in the elderly, who are prone to fall and cause more serious damage to the body. Let the patient eat more high-protein and high-calcium foods to replenish the nutrients needed by the body, and perform appropriate exercises to accelerate the body’s absorption of calcium and reduce the occurrence of this symptom.