A raised bump on the back of the head can be painful, and in this case it may be a normal tissue of the body called the spinous process. Prolonged head bowing and other postures may cause local soft tissue muscle spasm, resulting in synovial inflammation, local congestion and edema, leading to pain. It is also important to look for local soft tissue infections, subcutaneous purulent infections and folliculitis that can cause localized pain. Local tumor disease may also cause local pain. It is necessary to actively improve the ultrasound examination, and if necessary, surgical removal.