Severe and Increasing Headache.
Focal Neurologic Finding (A deficit or problem with nerve, spinal cord, or brain function that indicates a specific location in the brain, such as an issue with the left side of the face, numbness, tingling, bulging pupils, loss of function of a limb).
Loss of Range of Motion.
Significant Cervical Pain (Pain in the neck area in relation to the spine. Most episodes will get better with time, but if accompanied by neurological deficits or lack of appetite over time could indicate a more serious issue)
Increasing Confusion or Disorientation.
Loss of Consciousness for longer than 30 seconds.