For a small segment of the population, cluster headaches can be a debilitating condition that strikes without warning. Cluster headaches can strike seemingly random intervals, for which they gain their name. Patients are known to live for years without a problem, and suddenly suffer them for days or weeks at a time. The cause behind cluster headaches remains a mystery, although it is thought that stress, alcohol, and drugs are all prompters of the condition. Even without these factors, however, a series of cluster headaches can befall a patient at any time in their life. A cluster headache is easy to differentiate from a normal headache because of its severity and distinct symptoms.
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