Babies always exert themselves to earn attention to the following two situations: 1, vitamin D deficiency rickets. Mostly seen in 3-4 months old babies, easy to breath-holding kind of exertion, face hold red, at the same time will be accompanied by excessive sweating, easy to startle, night crying and occipital baldness and other symptoms, and outdoor activities, mothers in the second trimester of pregnancy have calcium deficiency manifestations, after giving supplemental vitamin D and calcium will be improved.2, brain injury syndrome. If the baby has body tilting back, limb exertion, body thrashing, and there are high-risk factors before, during or after the baby’s birth, such as preterm birth, low birth weight babies, hypoxic ischemic encephalopathy, etc., and if there is a history of the above diseases, it is necessary to go to the Department of Children’s Rehabilitation in a timely manner.