A headache behind the eye is known as a cluster headache, according to WebMD. The term refers to a category of headache that recurs in "clusters" of several times per day over weeks or months. More »

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Because there are different types of brain tumors that can form behind the eyes, there can be different causes for them that can include cancer and genetic disorders or mutations. For example, an optic nerve glioma is a ... More »

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The most common reason for morning headaches is sleep disorders, according to the American Headache Society, and headache sufferers have a greater propensity for sleep disorders. Too little or too much sleep, obstructive... More »

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Small, unruptured aneurysms in the brain have no symptoms, but larger aneurysms may press on the brain and cause a localized headache, dilated pupils, blurred vision, and pain behind or above the eye, explains the Brain ... More »

The side effects of a mild concussion can include confusion and clumsiness, headache, ringing in the ears, and nausea or vomiting, says WebMD. The person can also be sluggish, find it hard to concentrate and suffer from ... More »

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Early warning signs of carbon monoxide poisoning include headache, dizziness and nausea, according to WebMD. As the poison builds in the blood, symptoms worsen and can include confusion, drowsiness, chest pain, fast hear... More »

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Symptoms of heat stroke include dizziness, headache, fatigue, nausea and vomiting according to WebMD. Other signs of heat stroke are flushed skin that is either hot and dry or cold and clammy, a body temperature of 104 d... More »

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