Oxygen is good for cluster headaches

For cluster headaches, oxygen is good medicine, study finds | Booster Shots | Los Angeles Times: "'Cluster headache is probably the most severe pain known to humans. Most female patients describe each attack as worse than childbirth.'

You’d think that such an excruciating condition would require some mighty strong medicine. But a study coming out today in the Journal of the American Medical Assn. -- the source of the statement above -- concludes that cluster headaches can be treated by inhaling pure 100% oxygen."