The bone at the back of the head is the occipital bone of the body, which is part of the skull. The back of the head has a protruding bone that is the landmark structure above the occipital bone called the occipital ridge. The occipital ridge is the attachment point for the muscles that connect the neck, back and head. When doing the movement of looking upward, the occipital ridge is pulled by the muscles on the back side of the neck through contraction to complete the movement of the human head. If there is pain in this position, it is likely to be caused by injury or lesion of the local muscle attachment point. If the front of the chest is hit, so that the head is suddenly lowered forward, for example, when driving suddenly rear-ended, it will cause damage to the muscles at the back of the neck, and painful symptoms will occur at the occipital ridge. If it is a special occupation that requires frequent head lifting and lowering, or working with the head down all the time, there will be a local chronic strain injury, which will also lead to local pain.