A 3-year-old child with a bump on the back of his head from hitting a coffee table should seek medical attention and follow the doctor’s instructions to determine if a CT scan is necessary. A layman is generally unable to accurately determine whether a 3-year-old child with a bump on the back of his head on a coffee table needs a CT scan, and should consult a doctor at the first opportunity, who will be able to determine whether a CT scan is necessary through clinical symptoms. If you make your own judgment, you may delay treatment and cause serious consequences. Therefore, when the child hit the back of the head of the coffee table bag, should be urgent medical examination and treatment, in the process of treatment should also actively cooperate with the doctor, do a good job in all aspects of care, do not let the child strenuous exercise, reasonable rest, and calm the child’s emotions, do not let the child there is too much psychological pressure.