After a one year old falls on his head, you can usually make sure it is okay by post-injury manifestations and imaging tests. 1. Post-injury performance: After a one-year-old falls on the head, you need to observe whether there is obvious bleeding, hematoma, nausea, vomiting, crying, lethargy or irritability and other problems. If there is more than crying, vomiting, lethargy, irritability, hematoma progressive increase, mostly suggests that the injury is more serious, need to consult a doctor in time. 2. imaging examination: baby after injury, such as vomiting, walking unsteadily, coma and other symptoms, it is recommended that timely consultation, improve the skull CT, MRI and other tests to clarify whether there is a skull fracture, intracranial hemorrhage and other conditions. After a one-year-old baby fell on his head, he should promptly go to the hospital for examination, and according to the results of the examination for targeted treatment.