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 » Health Conditions & Diseases

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 » Health Conditions & Diseases Cancer

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 » Health Conditions & Diseases
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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 symptoms of a silent migraine typically mimic those of a migraine without headache pain, and they may include emotional shifts, vision changes, language difficulties, diarrhea and thirst, according to WebMD. Symptoms... More » Health Conditions & Diseases

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 » Health Conditions & Diseases

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 » Health Conditions & Diseases