Symptoms of vitamin D deficiency rickets in infants may be restlessness, lack of sleep, slow growth, a delay in crawling, sitting or walking, thinness of the top and back of the skull (craniotabes), swelling of the skull (bossing), bead-like nodules where the ribs and their cartilages join due to the rapid growth of the arms and the rib cage (rachitic rosary), and a delay in the closing of the skull bone.