<unk>  is the symptom of pain in the face, head, or neck. It can occur as a migraine, tension-type<unk> , or cluster<unk> . There is an increased risk of depression in those with severe<unk> s.<unk> s can occur as a result of many conditions. There are a number of different classification systems for<unk> s. The most well-recognized is that of the International<unk>  Society which classifies it into more than 150 types of primary and secondary<unk> s. Causes of<unk> s may include dehydration; fatigue; sleep deprivation; stress; the effects of medications (overuse) and recreational drugs, including withdrawal; viral infections; loud noises; head injury; rapid ingestion of a very cold food or beverage; and dental or sinus issues (such as sinusitis). Treatment of a<unk>  depends on the underlying cause, but commonly involves pain medication (especially in case of migraine or cluster<unk> . A<unk>  is one of the most commonly experienced of all physical discomforts. About<unk> lf of adults<unk> ve a<unk>  in a given year. Tension<unk> s are the most common, affecting about 1.6 billion people (21.8% of the population) followed by migraine<unk> s which affect about 848 million (11.7%).
Headache
Toothache
Nausea
Tinnitus
Osmophobia
Vomiting
Dizziness
Nasal congestion