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11 Causes of a Metallic Taste in the Mouth

8. Trauma and Injury

A metallic taste in the mouth can sometimes be caused by trauma and injury. Damage to the tongue, whether from an accident or from biting, can affect the sense of taste and lead to a metallic taste in the mouth. Injuries to the head, face, nose or mouth can cause nerve damage and affect the sense of taste, resulting in a bad taste in the mouth. Chemical poisoning, for instance from exposure to insecticides and pesticides, can also affect the sense of taste and lead to a metallic taste in the mouth.

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