The reasons why the back of the head hurts when the patient shakes his head should be considered as follows: 1. Consider that it may be related to cold or fever, when the patient has cold or fever, the toxin secreted by virus or bacteria will cause some stimulation to the fascia of the head, which will easily lead to headache symptoms, and the headache symptoms will be aggravated when the patient shakes his head. 2. Consider that it is caused by tension headache, if the improper posture causes the head and neck muscles to be in a state of tension and contraction, which will easily cause the patient to have headache when the head shakes. 3. If the head and neck muscles are in a state of tension and contraction, it is easy to cause headache in patients, and when the head is shaken, the pain at the back of the head will be aggravated. 3. If the back of the head hurts when the patient shakes it, consider it caused by occipital neuralgia. If the patient has pain at the back of the head when he/she is cold or damp, the pain will increase when the patient sneezes, shakes his/her head or goes up the stairs.