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Migraine without aura is a headache disorder characterised by attacks of usually one-sided (although sometimes it can be both sides), pulsating head pain of moderate to severe intensity. Migraine attacks typically last 4-72 hours and are associated with nausea, vomiting, and sensitivity to light, sound,...

When cerebrospinal fluid pressure is too high or low, people can experience headache. High cerebrospinal fluid (CSF) pressure is referred to as 'idiopathic intracranial hypertension', while headache caused by low CSF pressure is often called a 'post-dural puncture headache'. Idiopathic intracranial hypertension (IIH) Idiopathic intracranial hypertension is...

Alcohol can cause headache in two ways - either while you're drinking, or as a delayed effect (a hangover). The headache normally has a pulsating quality and is aggravated by physical activity. There are a number of reasons why alcohol causes headache - it dilates...

Pressure headache results from sustained compression or traction against the head, for example wearing a tight headband, goggles, or having a tight ponytail that pulls against the scalp. The pain is worse at the site of compression and will resolve usually within one hour after...

Fasting headache is caused by not eating for a prolonged period of time, and can be resolved by eating again. They are non-pulsating and the pain is mild to moderate and diffuse, although the likelihood of headache and severity of pain may increase in connection...

There are a number of eye disorders that cause headache, but the most common cause of eyestrain headache is due to uncorrected refractive errors. For example, if someone is long-sighted and has to read a book without their glasses, the prolonged eyestrain can cause headache....

Primary exercise headache is brought on by strenuous physical activity. It generally has a throbbing quality and affects both sides of the head. This type of headache can last five minutes up to 48 hours. Primary exercise headache does not have any other associated symptoms,...

New daily persistent headache is a unique headache that is persistent for over three months, with a distinct time of onset that can typically be recalled by the person. The pain doesn't have any specific features, but it is often similar to migraine or tension-type...

Low blood oxygen levels (hypoxia) and high blood carbon dioxide levels (hypercapnia) can cause headache due to issues with oxygen circulation in the body. This can develop when travelling to high altitudes, aeroplane travel, deep sea diving, and sleep apnoea. Headaches manifest differently in each...

Medication-overuse headache is a disorder caused by overusing certain medications used to treat pain disorders. The headache manifests after regularly using too much medication (such as triptans, ergotamine, paracetamol, or opioids), for over 3 months. The resulting headache occurs on 15 or more days in...

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