What Causes a Persistent Metallic Smell in the Nose That Will Not Go Away?
1. Introduction A persistent metallic smell in the nose is typically caused by phantosmia due to olfactory nerve damage, chronic sinusitis, or microscopic bleeding within the nasal cavity. When the delicate sensory receptors in the roof of the nose are compromised by viral inflammation or chemical trauma, they misfire, sending chaotic electrical signals to the … Read more