Headache is diagnosed by history and physical exam (Mayo Clinic, 2013). Patient most likely has migraine headache without aura because patient has unilateral pain, throbbing quality, moderate intensity pain and nausea. According to Dunphy et al. (2015) migraine without aura requires two of the following characteristics; they are unilateral location, pulsating quality, moderate to severe intensity and exacerbation by physical activity. In addition at least one of the following must be present: nausea or vomiting, photophobia or phonophobia (Gofshteyn & Stephenson, 2016). I agree that laboratory test are not needed in this case because lab tests are ordered only if infectious process is suspected (Cash & Glass, 2015). No imaging is needed because
