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2. Cluster headache - Wikipedia

   en.wikipedia.org/wiki/Cluster_headache

   Cluster headaches may occasionally be referred to as "alarm clock headache" because of the regularity of their recurrence. Cluster headaches often awaken individuals from sleep. Both individual attacks and the cluster grouping can have a metronomic regularity; attacks typically strike at a precise time of day each morning or night.

3. Chronic paroxysmal hemicrania - Wikipedia

   en.wikipedia.org/wiki/Chronic_paroxysmal_hemicrania

   When compared to cluster headaches, CPH attacks are typically shorter. [6] Each headache is centered around the eye, temple and forehead or the back of the head and is localized to one side of the head. While redness and watering of the eye are associated with CPH, patients typically do not experience nausea or vomiting. [7]

4. SUNCT syndrome - Wikipedia

   en.wikipedia.org/wiki/SUNCT_syndrome

   SUNCT must be properly distinguished from cluster headaches, since cluster headaches also occur several times per day with separate attacks, and share some common symptoms. However, cluster headaches usually last longer (up to three hours), occur less often (three to five attacks per day), and do not accompany cranial autonomic symptoms.

5. Some types of headaches are linked to the body’s internal ...

   www.aol.com/news/types-headaches-linked-body...

   Cluster headaches are a rare type of headache that cause bursts of intense pain around the eye. Each burst lasts about 15 minutes, but an attack can last between one and three hours.

6. Trigeminal autonomic cephalgia - Wikipedia

   en.wikipedia.org/wiki/Trigeminal_autonomic_cephalgia

   Trigeminal autonomic cephalalgia (TAC) refers to a group of primary headaches that occurs with pain on one side of the head in the trigeminal nerve area and symptoms in autonomic systems on the same side, such as eye watering and redness or drooping eyelids. [1] [2]

7. Hemicrania continua - Wikipedia

   en.wikipedia.org/wiki/Hemicrania_continua

   The factor that allows hemicrania continua and its exacerbations to be differentiated from migraine and cluster headache is that hemicrania continua is characterized by complete response to therapeutic doses (25–300 mg) of indomethacin. The positive response to this drug is, in fact, a fundamental sine qua non criterion used in differential ...