The clinical manifestations of rickets due to vitamin D deficiency are as follows: 1, the most common is due to vitamin D deficiency and a series of symptoms, such as localized pain, especially bone pain, the pain is more intense. 2, can also be due to minor violent injury, resulting in bone fractures. 3, in the development of the teeth can be found in the development of the teeth are delayed and brittle, easy to damage. 4, vitamin D deficiency caused by rickets, can lead to mental retardation and height is significantly shorter than children of the same age, which is caused by a serious lack of calcium intake. Rickets, caused by vitamin D deficiency, can lead to mental retardation and a much shorter height than children of the same age, due to a serious lack of calcium intake. In the middle and late stages will be found in the O-shaped leg deformity, the more serious will also produce hand and foot convulsions and severe muscle weakness phenomenon.