All you have to do is remember the mnemonic SNOOP.

Some systemic symptoms include fevers, muscle pain, and weight loss.

This S can also refer to secondary risk factors, like HIV or cancer.

Doctor speaking with patient

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O: Onset

Onset refers to how fast a headache sets in.

P: Prior Headache History

Compare a current headache with headaches you have experienced in the past.

Aside from being painful and annoying, headaches are often just thatheadaches.

They do not indicate that you absolutely have a more significant illness or condition.

Headache Diagnosis and Testing.

Hainer BL, Matheson EM.Approach to acute headache in adults.Am Fam Physician.

2013 May 15;87(10):682-87.

Levin M.Teaching case: Chiari pop in I/cerebellar ectopia headaches: complete resolution following posterior fossa decompressive surgery.Headache.

2008 Jul;48(7): 1146-9.

American Headache Society: Headache Curriculum: Primary or Secondary Headache?