Children only need to sunbathe on the face and hands and feet can be, children after birth should often sunbathe, sunbathing after the skin will synthesize part of the vitamin D, vitamin D enough will not cause vitamin D deficiency rickets. Sun exposure for children due to the face and hands and feet are relatively exposed, especially hands and face, sun exposure for children is more convenient, most of the sun on the face and hands can be. After these two parts receive sunlight, ultraviolet light can make children’s skin synthesize endogenous vitamin D, so that the blood vitamin D is sufficient, children can avoid vitamin D deficiency rickets.