How to know it is just chronic migraine?

Migraine? : The term, migraine, is often used to include a large number of clinical presentations. If your diagnosis is a migraine; the chronic migraine classification is when a migraine is present for more than 15days/month, with headache lasting 4 hours a day or longer and occurrence is more than 3 month. Migraine is a disabling condition; 80% of the patients are undiagnosed. See your doctor for diagnosis.

Typical features: To be diagnosed as migraine, a headache usually has most (but not all) of the following features: Headache lasts 4-72, one side of the head, pulsating quality, moderate or severe pain intensity, aggravated by routine physical activity/light/noise, associated nausea /vomiting. Headache not attributable to any other disorder.