Headache is a very common condition that affects up to 60% of the world’s population. In general, headache can be classified into two main categories: primary and secondary headaches. A primary headache is related to increased sensitivities, but not structural alterations of brain tissues. Common primary headaches are migraine with and without aura, tension-type headache, and trigeminal autonomic cephalalgias (headaches, such as cluster headache, that also involve facial pain and autonomic symptoms such as tear production and nasal congestion). Secondary headaches have various underlying causes including structural vascular disorders, tumor, trauma, seizure, substance use, infection, metabolic problems, or autoimmune diseases.

Headaches have many possible causes, and proper management requires accurate diagnosis. Primary headaches are typically managed with some combination of preventive and symptom-relieving medications. Secondary headaches may be treated by addressing the underlying cause.

When do I need to see a doctor for my headaches?

Seeing a medical provider is strongly recommended if headaches become more frequent, last longer, change patterns, or increase in intensity. For a new headache visit, health care providers typically perform physical and neurological examinations to determine the cause of the headache.

A primary care provider (PCP) would be the first contact for mild headache symptoms that have been worsening. Your PCP would likely refer you to a neurologist if your headaches did not respond to medications, or if he or she suspected a secondary headache. Sudden onset of severe headache should prompt a visit to the emergency department.

Which imaging tests help headache management?

Many providers would consider ordering brain imaging studies, such as CT scans and MRIs, to help them diagnose worsening headache. CT scan is an x-ray-based imaging study. It is an excellent initial imaging test for detecting bleeding, skull fractures, and space-occupying lesions such as tumors. CT scans do expose patients to a low dose of radiation so their use should be limited, because the effects of radiation exposures add up over time and could reach a harmful level.

In contrast, MRI uses a magnetic field to generate imaging without radiation. It produces more detailed images than CT scans, especially of the brain, the meninges (the membranes that enclose the brain and spinal cord), nerves, and blood vessels. However, MRI cannot be performed in people with pacemakers or other elec

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