Like Nurse Henia, individuals with phantosmia “smell” odors that are not actually there. This type of olfactory hallucination can happen in one nostril or both, with varying odors. Common phantom smells include cigarette smoke, burning rubber, a chemical or metallic smell, or spoiled food. These odors can be constant or come and go. There are many causes of phantosmia, including upper respiratory infections, dental problems, migraines, common colds, allergies, and sinus infections. It can also r