1. Cluster headaches
Cluster headaches are headaches that happen in groups or periods that are more common in men than in women. Cluster headaches occur on a frequent basis, often several times per day, for a period of time, accompanied by a headache-free period of months or even years. The headaches strike without warning and are characterized by intense, paralyzing pain on either the right or left side of the brain, as well as a watery eye, nasal inflammation, or a runny nose on the same side of the face. During a migraine attack, sufferers are frequently restless and unable to relax, and they are unable to lie down as a migraine patient does.
Cluster headaches have no clear cause, but they may have a genetic link. Alcohol, nicotine, high altitudes, and some diets may also be triggers. While there is no treatment, drugs will help to minimize the number and severity of occurrences.