Headaches due to an underlying condition (secondary headaches) including- Trauma or injury, Cranial or cervical vascular disorders, Non-vascular intracranial disorders, Exposure to, or withdrawal from, a substance. Infection. Disorders of homeostasis. Disorders of the cranium, neck, eyes, ears, nose, sinuses, teeth, mouth or other facial or cranial structure. Psychiatric disorders such as somatization disorder.