To determine whether the infant is rickets or not can be judged by the symptoms of the child, you can also go to the hospital for examination, such as laboratory tests, imaging tests and so on. 1. Symptoms: children in the early stage usually do not have typical symptoms, some children will appear irritable, excessive sweating, shaking head, crying at night, sleep disturbance and other symptoms. In the active stage of rickets, children will have symptoms such as thin skull, increased head circumference, poor weight-bearing capacity of the lower limbs, bending of the bones, as well as muscle weakness, anemia, mental retardation and other symptoms. 2. Laboratory examination: If the examination result shows vitamin D index <30nmol/L, and there is a decrease in blood calcium, blood phosphorus, alkaline phosphatase, parathyroid hormone increase, etc., it may be rickets. 3. Imaging: the epiphysis of children with rickets will appear widening, calcified band fuzzy disappearance, brush-like and other manifestations. To determine whether the infant is rickets need to be judged by symptoms and medical examination, parents are advised to bring their children to the hospital in time for examination, not to judge on their own.