Clinically, the phenomenon of a patient with a bulging bone in the middle of the head can lead to a number of conditions, such as infants who are born with soft bones and sleep on their sides for long periods of time. In addition, the patient’s head may also appear to be bulging after direct external force, resulting in localized subcutaneous hematoma that is not absorbed in a timely manner. Patients with abnormal cranial hyperplasia or occupational lesions in the middle of the skull may also have a bulging appearance. A clear diagnosis can be made by taking an X-ray or CT film of the skull. Patients who have this phenomenon need to be seen in time to avoid delaying the disease or missing the best time for treatment.