The nose always smells smoke, mostly around the existence of smoke, but also may be due to olfactory allergies or phantom smell and other reasons. 1. Smoke odor around you: Sometimes the smoker is not far away from you, and the space circulation causes the smoke odor to float and transmit to the nasal olfactory region and perceive the existence of the smoke odor. 2. Olfactory sensitization: the very strong sensation to the slightest odor, even accompanied by headache, nausea, vomiting, mostly for olfactory neuritis or olfactory nerve degeneration of the early phenomenon, may also be neurosis. 3. Phantom smell: phantom smell is a relatively common psychiatric olfactory abnormality, it and phantom hearing usually constitute the hallucinatory symptoms of psychiatric patients. Patients with sensory memory abnormalities sometimes show some kind of phantom smell, such as “déjà vu”. If your nose always smells like smoke, you should go to the hospital in time to find out the cause and take targeted treatment.