In this condition, a child’s bones do not harden and are ill/malformed due to deficiency of Vitamin-D that helps Calcium salts to get deposited in the bones so that the bones could become rigid. Lack of Calcium absorption results in softer bones which bend and gets deshaped. Renal rickets surfaces due to impaired rental function---the bones are malformed due to excretion of bone-forming minerals in the urine. If this condition occurs in adults, it is called Osteomyelitis. Best and cheapest source of Vitamin-D is sunshine which, if not available, may be compensated through related Vitamin. Consult a doctor about actual treatment, dosage, frequency and duration of medication. Mothers who are deprived of sunlight are also victims of these diseases (called Osteomyelitis)