There are many reasons for the phenomenon of small head in clinical patients, including congenital genetic factors, but also after the birth of infants with brain dysplasia, which can lead to the manifestation of small head. If infants lack calcium or other trace elements for a long time, it will also affect the development of the patient’s skull, resulting in a small head and other clinical manifestations. In addition, after the age of 18, the bones of the skull are mature, although the patient’s head is small, but in normal proportion with the body, and there is no other abnormal uncomfortable feeling, which is a normal physiological phenomenon, there is no need to take special treatment. If there is an abnormal feeling in the head, it is necessary to go to the hospital after the doctor gives the correct diagnosis, and then take the correct treatment, which can gradually alleviate the clinical symptoms.