There are many different reasons why a headache may occur in the back of the head. Usually due mainly to tension headaches, cervical spondylosis, and occipital neuralgia, poor posture can also lead to pain in the back of the head. 1, Tension headache, is the most common cause of pain in the back of the head. It lasts as short as half an hour and as long as several days. This type of headache attacks with tightness in the back of the head, usually not very serious, not accompanied by nausea or vomiting. It is mainly caused by fatigue, poor mood and other factors. 2. Cervical spondylosis can cause pain and discomfort in this region. Cervical spondylosis in the upper cervical segment may cause headache due to compression of the spinal cord and nerve roots in the upper cervical segment, headache caused by insufficient blood supply to the brain due to compression of the vertebral and basilar arteries, and atlanto-atlantoaxial joints deformities and dislocations may also cause headache and dizziness. 3.Occipital neuralgia is a unique kind of headache. It mostly starts from the neck and spreads to the back of the head, and then spreads to the area behind the ear. It can be associated with injury or irritation of the occipital nerve, which runs from the back of the neck up to the base of the scalp. The most obvious feature of this pain in the back of the head is the presence of scalp pressure in the area controlled by the occipital nerve, and the pain of occipital neuralgia is generally more intense and may be due to degeneration and compression of the occipital nerves, as well as infectious diseases. Upper neck cervical spondylosis can also lead to occipital neuralgia 4, poor posture can also lead to pain and discomfort in the back of the head. Poor posture creates tension in the back, shoulders and neck, and this tense muscle may lead to headaches. Headaches like electric shocks may occur at the back of the head, mostly when sitting or standing for too long, semi-recumbent position, and sudden onset of pain when turning the neck. Generally, the causes of disorders caused by the back of the head are relatively not serious problems. The pain can be resolved with some common analgesic medications. However, the causes of pain in the back of the head are more varied, cervical spondylosis, hypertension, cerebral artery ischemia and various other causes can be caused, and when it continues to occur for a longer period of time, you should seek medical attention in a timely manner.