Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content + Download Section PDF Listen ++ For further information, see CMDT Part 24-01: Headache + Key Features Download Section PDF Listen +++ ++ A variety of nonspecific symptoms may follow closed head injury, regardless of whether consciousness is lost + Clinical Findings Download Section PDF Listen +++ ++ Onset and course of headache Usually appears within a day or so following injury May worsen over the ensuing weeks Gradually subsides Duration of symptoms Relates in part to the severity of the original injury However, even mild injuries may be followed by symptoms that persist for months Usually a constant dull ache, with superimposed throbbing that may be localized, lateralized, or generalized Sometimes accompanied by nausea, vomiting, or scintillating scotomas + Diagnosis Download Section PDF Listen +++ ++ Special investigations are usually not helpful Electroencephalogram may show minor nonspecific changes Electronystagmogram sometimes suggests either peripheral or central vestibulopathy CT scans or MRI of the head usually are normal + Treatment Download Section PDF Listen +++ ++ Headaches often respond to simple analgesics Severe headaches may necessitate preventive treatment as outlined for migraine