Literature reviews find that approximately 64–77% of adults<unk> ve<unk> d a<unk>  at some point in their lives. During each year, on average, 46–53% of people<unk> ve<unk> s. However, the prevalence of<unk>  varies widely depending on how the survey was conducted, with studies finding lifetime prevalence of as low as 8% to as high as 96%. Most of these<unk> s are not dangerous. Only approximately 1–5% of people who seek emergency treatment for<unk> s<unk> ve a serious underlying cause. More than 90% of<unk> s are primary<unk> s. Most of these primary<unk> s are tension<unk> s. Most people with tension<unk> s<unk> ve "episodic" tension<unk> s that come and go. Only 3.3% of adults<unk> ve chronic tension<unk> s, with<unk> s for more than 15 days in a month. Approximately 12–18% of people in the world<unk> ve migraines. More women than men experience migraines. In Europe and North America, 5–9% of men experience migraines, while 12–25% of women experience migraines. Cluster<unk> s are relatively uncommon. They affect only 1–3 per thousand people in the world. Cluster<unk> s affect approximately three times as many men as women.
Headache
Toothache
Nausea
Tinnitus
Osmophobia
Vomiting
Dizziness
Nasal congestion