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By Mayo Clinic staffBy 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