Cluster headaches are rare headaches that often occur in groups or clusters and are frequently associated with drooping eyelids, red, watery eyes and nasal congestion on the affected side of the face. This is also characterized by severe headaches of piercing quality near one eye or temple that last for between fifteen minutes to three hours.

Victims of this condition do not only feel an intense pain, but also experience disabling effects and impacts on emotions, marriage, finances and other obligations at school or work. This also diminishes the quality of the patient