A<unk>  is an outdated term to describe certain types of headache which were thought to be related to blood vessel swelling and hyperemia as cause of pain. There is no doubt that some headaches are caused by<unk>  effects. However, it is no longer a recognized term and not mentioned in the Headache classification of the International Headache society (IHS), although it is still used by some physicians and still mentioned in some medical classification systems. There are many types of<unk> s. Other types of<unk> s include headaches produced by fever, cluster headaches, and headaches from a rise in blood pressure (OSU Wexner Medical Center, 2012). Headaches that were described as being<unk> s include: * Cluster headache * Migraine * Toxic headache
Vascular headache
External compression headache
Lupus headache
Cluster headache
Tension headache
Medication overuse headache
Cold-stimulus headache
Red wine headache