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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. 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]

4. Vagus nerve stimulation - Wikipedia

   en.wikipedia.org/wiki/Vagus_nerve_stimulation

   Vagus nerve stimulation (VNS) is a medical treatment that involves delivering electrical impulses to the vagus nerve. It is used as an add-on treatment for certain types of intractable epilepsy, cluster headaches, treatment-resistant depression and stroke rehabilitation.

5. Management of chronic headaches - Wikipedia

   en.wikipedia.org/.../Management_of_chronic_headaches

   Many people with chronic headaches fail to recognize foods or beverages as headache factors, because the consumption may not consistently cause headaches or the headaches may be delayed. [43] Many of the chemicals in certain foods can cause chronic headaches, including caffeine, nitrites, nitrates, tyramine, and alcohols. [ 44 ]

6. Headache - Wikipedia

   en.wikipedia.org/wiki/Headache

   Abortive therapy for cluster headaches includes subcutaneous sumatriptan (injected under the skin) and triptan nasal sprays. High flow oxygen therapy also helps with relief. [11] For people with extended periods of cluster headaches, preventive therapy can be necessary. Verapamil is recommended as first line treatment. Lithium can also be useful.

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 ...