When a child hits the back of the head, there may not be serious consequences if the object hit is soft and the height of the fall is not too high. If the child falls while sitting and hits the back of the head, and the height is not too high, or the object hit is soft, there may be a slight hematoma, with no obvious crying, localized swelling, or mental changes. If the child falls standing up or falls off the bed, or knocks against a hard object, there may be more than crying, local hematoma, drowsiness, coma and other symptoms, which indicates that the injury is more serious, and need to consult a doctor in a timely manner. Each child’s physical condition is different, so the symptoms that appear after hitting the back of the head are also different. Generally, after hitting the back of the head, you need to observe the child’s physical condition, and judge whether there is bleeding, violent crying, and whether there is any abnormal symptom of the spirit. If you can’t tell, it is recommended to consult a doctor for a cranial CT or MRI to understand your baby’s physical condition and then treat him/her appropriately.