You are looking for cluster headaches
A worldwide support group for those who suffer from cluster headaches.
www.clusterheadaches.com
Cluster headache, nicknamed "suicide headache", is a neurological disease that involves, as its most prominent feature, an immense degree of pain.
en.wikipedia.org/wiki/Cluster_headache
Cluster headache — Comprehensive overview covers symptoms, causes, treatment and prevention of this painful condition.
www.mayoclinic.com/health/cluster-headache/DS00487
Information resources about cluster headaches including symptoms, precipitating factors, and treatment for acute attacks including invasive procuderal treatments.
www.clusterheadaches.com/about.html
Explains the cluster headaches, its symptoms, and possible treatments and their side effects, in comparison with other types of headaches.
adam.about.com/reports/Headaches-cluster.htm
Information about cluster headaches from the American Academy of Family Physicians.
familydoctor.org/online/famdocen/home/common/brain...
Cluster headaches occur over a period of time. Learn about the symptoms, treatments, and causes of cluster headaches.
www.webmd.com/migraines-headaches/guide/cluster-he...
Cluster headaches may also be known as histamine headache, red migraine, Horton's The cluster headache sufferer has a considerable amount of pain-free intervals
www.headaches.org/education/Headache_Topic_Sheets/...
Overview: Cluster headache, also known as histamine headache, is a form of neurovascular headache. Attacks usually are severe and unilateral and typically
emedicine.medscape.com/article/792150-overview
Cluster headaches come in cycles (also called cluster periods) After a cluster period ends, you may not get another headache for months or even years.
www.cigna.com/healthinfo/hw186774.html
