what causes a headache in the back of your head
The most common type of headaches are likely caused by tight muscles in your shoulders, neck, scalp, and jaw. These are called tension headaches. 1  They may be related to stress, depression, anxiety, a head injury, or holding your head and neck in an abnormal position. 2  Tension headaches tend to be on both sides of your head. 3  They often start at the back of your head and spread forward.