Why do I taste metal when I hit my head?
Some common medical conditions that can cause metallic taste in the mouth include ear or upper respiratory infections such as sinusitis, as well as head injury or conditions that damage the central nervous system (CNS). A history of radiation therapy to the head and neck can also cause a metallic taste in the mouth. Why do I taste something weird when I hit my head? Loss or changes to taste and smell may be caused by injury to the nasal passages, damage to the nerves in the nose and mouth, or injury to the brain itself.
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