Neck injuries, such as whiplash injuries, or chronic repetitive stress injuries, such as poor posture, can cause the joints in your neck to lock up in an abnormal position leading to restricted range of motion, increased muscle stiffness, and strain on the nerves and blood vessels between your head and neck. This increased muscle stiffness can trigger referred pain and pressure that may be felt in the forehead, temples, and base of the skull. Treating the underlying neck dysfunction may be as simple as correcting your posture and can dramatically reduce these symptoms.