Differential Diagnosis for Headache with Metallic Taste

Life-Threatening Causes to Rule Out First

Subarachnoid hemorrhage presenting with thunderclap headache may be accompanied by altered taste sensation, according to the American College of Radiology 1
Brain tumor or space-occupying lesion causing progressive headache with associated neurological symptoms including taste disturbances, as recommended by the Journal of the American College of Radiology 2
Increased intracranial pressure manifesting as headache that awakens patient from sleep or worsens with coughing, sneezing, or exercise, as stated by the American College of Radiology 1
Giant cell arteritis in patients over 50 years with new-onset headache, scalp tenderness, and jaw claudication requires immediate evaluation, according to the American College of Rheumatology 3
Stroke or transient ischemic attack presenting with atypical aura and focal neurological symptoms, as recommended by the American Heart Association 1
Meningitis with headache, neck stiffness, and unexplained fever, as stated by the Infectious Diseases Society of America 1
Sinusitis, particularly maxillary, can cause both headache and altered taste, especially following dental procedures, according to the British Journal of Anaesthesia 4

Dental procedures affecting upper premolars or molars can lead to maxillary sinusitis with both headache and taste disturbance, as recommended by the British Journal of Anaesthesia 4
Salivary gland disorders, such as stones or infection, causing referred pain and taste disturbance, according to the American College of Radiology 4

Age ≥40 years with new severe headache, focal neurological symptoms or signs, altered consciousness, memory, or personality, neck stiffness or limited neck flexion, witnessed loss of consciousness, onset during exertion, or progressive worsening over time warrant urgent neuroimaging, as stated by the American College of Radiology 1

Complete neurological examination including cranial nerves, motor/sensory function, and cerebellar testing, as recommended by the British Journal of Anaesthesia 4
Vital signs and fever assessment to rule out infectious causes, according to the American College of Radiology 1
Non-contrast head CT if presenting <6 hours from acute severe headache onset, as stated by the American College of Radiology 1
MRI brain with and without contrast for subacute presentations or when tumor/inflammatory process suspected, as recommended by the Journal of the American College of Radiology 2
Dental panoramic radiographs if dental pathology or sinusitis suspected, according to the British Journal of Anaesthesia 4
ESR/CRP if temporal arteritis suspected, as recommended by the American College of Rheumatology 3
Lumbar puncture if CT negative but subarachnoid hemorrhage still suspected, according to the American College of Radiology 1

Do not dismiss metallic taste as benign without thorough evaluation, as it is not a typical feature of primary headaches, according to the American College of Radiology 7
Do not rely solely on imaging without considering complete clinical picture including temporal relationship and associated symptoms, as stated by the American College of Radiology 1
Do not miss temporal arteritis in elderly patients, as delay in treatment can lead to permanent vision loss, according to the American College of Rheumatology 3