Weather Changes, Smoking and Heredity
Cluster headaches tend to occur on just one side of the head, and often, two, three or more times in a row for days on end. The National Institute of Neurological Disorders and Stroke claims that these types of headaches are more common in smokers, and can also be triggered by changes in the weather. Cluster headaches may be mistaken for allergies. A tendency for cluster headaches can also be inherited, or result from a head injury.
Sinusitis
Sinusitis is a condition in which the linings of the sinus cavities become irritated or inflamed. Exposure to cigarette smoke, seasonal allergies and other respiratory conditions can contribute to this condition. It can occur in several sinuses or it can be isolated to a sinus cavity on the left side of the head or face. The Mayo Clinic states that sinus headaches can often be misdiagnosed as migraine headaches. The difference is the migraine headaches usually occur along with many other symptoms.
Aneurysms
If there is an aneurysm in the left side of the brain, it may cause a cluster or migraine-type headache on the left side. The National Headache Foundation states that aneurysms can be congenital, or occur as a result of very high blood pressure. In some cases, aneurysms produce no symptoms until they are very large and about to burst, at which time the headache will be severe. Headaches due to aneurysms may also cause symptoms during periods of physical exertion.
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