The subjects were divided into migraineurs and cluster headache sufferers. If yours happen often, ask your doctor if there's something you can take to help stop them. For some women, taking birth control pills improves migraines, but for others, that can make them worse. Cluster headaches differ from migraines, and are characterized by chronic, one-sided headaches that can include eye tearing, steady burning and sharp sensations, and stuffy noses. Results showed that about a third of patients engaged in sexual activity during a migraine or cluster headache. Other studies have shown that sex can alleviate migraines, but the studies were done on a smaller scale. Meanwhile, about 1 percent of the population suffers from headaches caused by sex , Evers told LiveScience. In fact, many migraine sufferers don't like to be touched when they have the headaches, because the episodes make them sensitive to light, noises and other sensations, he said. The finding, published in the March issue of the journal Cephalalgia, found that sexual activity relieved the pain of migraines or cluster headaches, severe, one-sided recurring head pains, for up to a third of patients. Study researcher Stefan Evers, a neurologist and headache specialist at the University of Munster in Germany, told LiveScience that sex releases endorphins, which are natural painkillers. Unfortunately for about 40 percent of the migraineurs who answered the survey, sex does not provide relief. For a third of the responding patients, sex worsened the migraines. They happen more often in men than women and may run in families. If that's you, know that changes in hormone levels right before your period often trigger headaches. Still others report sex with orgasm triggered migraines , but this is thought to be rare. There are two possible explanations for this: Some of the patients even reported using sex as a kind of headache therapy.