Most people have headaches from time to time. But if you have a headache more days than not, you may be experiencing a variety of head pain known as chronic daily headaches.
An estimated 3 percent to 5 percent of adults worldwide experience chronic daily headaches. The most common type of chronic daily headaches is divided into four subtypes:
* Chronic migraine
* Chronic tension-type headache
* New daily persistent headache
* Hemicrania continua
The incessant nature of chronic daily headaches makes them among the most disabling headaches. Aggressive initial treatment and steady, long-term management may reduce pain and lead to fewer headaches.
By definition, chronic daily headaches must occur at least 15 days a month, for more than three months. The signs and symptoms vary depending on the specific subtype:
Chronic migraine
* Usually evolves from episodic migraine without aura
* Includes at least two of the following — affects only one side of your head, pulsating or throbbing pain, moderate to severe intensity, aggravated by physical activity
* Includes at least one of the following — nausea or vomiting, sensitivity to light and sound
Chronic tension-type headache
* Usually evolves from episodic tension-type headaches
* Typically hurts on both sides of your head
* Mild to moderate pain, often described as pressing or tightening
* May include mild nausea or sensitivity to light or sound
New daily persistent headache
* Starts suddenly and occurs daily within three days of onset
* Hurts on both sides of your head
* Feels like a tightening or pressing sensation, not throbbing
* Mild to moderate intensity
* Sometimes includes one of the following — mild nausea, sensitivity to sound or sensitivity to light
Hemicrania continua
* Hurts on only one side of the head and pain never shifts sides
* Daily and consistent, with no pain-free periods
* Moderate intensity, interspersed with brief instances of severe pain
* Includes at least one of the following — tearing or redness of the eye on the affected side, nasal congestion or runny nose, swelling or drooping of the eyelid.
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