Chronic Tension Type Headache
Chronic tension type headache is classified as headache pain being bilaterally on both sides of the head, where the pain is usually symmetrical and equal from left to right.
Compared to migraines, chronic tension type headache causes mild to moderate pain, and feels more of a tightening and pressing sensation rather than a pulsating pain.
New Daily Persistent Headache
New daily persistent headaches usually occurs to those with no history of headaches. These headaches come on abruptly and suddenly. The pain usually becomes constant within the first three days from the commencement of the first headache.
Symptoms are similar to chronic daily tension headache, having pain bilaterally to both sides of the head. The quality of the pain is usually of a pressing and tightening sensation as opposed to a pulsating sensation. The pain is usually mild to moderate.
Chronic migraine usually occurs to those who suffer from a history of episodic migraines. Usually, their migraines have been left untreated, or have worsened over time and have now become chronic in nature.
The pain is usually unilaterally on one side of the head, however, can switch from left to right during the same attack or during different attacks. The pain is usually felt as a throbbing and pulsating sensation and is usually moderate to severe in nature.
Hemicrania continua is usually a more severe headache that typically affects one side of the head. The headache does not shift from side to side, and is usually locked on one side unilaterally.
This headache is present all the time with no pain-free periods. The pain is usually moderate in nature, however tends to have severe spikes of pain throughout the day.
People who suffer from this headache may also experience autonomic features such as a watery eye, swollen or droopy eyelids, redness in the eye, blocked or runny nose. Migraine like symptoms can also occur such as sensitivity to light, sound or smell, nausea and vomiting.