The<unk> s can vary greatly in their clinical presentation and duration. Quality of the<unk>  has been described as dull and/or pressure-like sensation, and throbbing and/or pulsating sensation. The pain is usually on both sides of the head (in 88–93% of people with<unk> , but may be unilateral, and may be localized to any head region. The pain can fluctuate in intensity and duration, is<unk> , and lasts more than 3 months. There may be accompanying photophobia, phonophobia, lightheadedness or mild nausea. Co-morbidity with mood disorders has been reported in a subset of patients. Cranial autonomic nervous symptoms occur with painful exacerbations in 21%, and cutaneous allodynia may be present in 26%. In 2002, Li and Rozen conducted a study of 56 patients at the Jefferson<unk>  Center in Philadelphia and published the following results: * 82% of patients were able to pinpoint the exact day their<unk>  started. * 30% of the patients, the onset of the<unk>  occurred in correlation with an infection or flu-like illness. * 38% of the patients had a prior personal history of<unk> . * 29% of the patients had a family history of<unk> . * 68% reported nausea. * 66% reported photophobia. * 61% reported phonophobia. * 55% reported lightheadedness. Imaging and laboratory testing were unremarkable except for an unusually high number of patients who tested positive for a past Epstein-Barr virus infection.
New daily persistent headache
Chronic subjective dizziness
symptoms of Migraine
symptom of Migraine
Long-term depression
Headache attributed to a substance or its withdrawal
Acute visual loss
symptom of Cluster headache