A blood-like smell may come from minor bleeding or crusting, but altered smell perception is also possible. Distinguish visible blood from a smell sensation alone.
Parosmia means an existing smell is perceived differently; phantosmia occurs without an external source. Report dryness, infection, previous viral illness and injury. It is inaccurate to say every nasal spray damages the smell nerve. Persistent one-sided symptoms, recurrent bleeding or new neurological signs need assessment. Severe headache, seizures or other acute changes require emergency help.
Assessment considers nasal blockage, infection history, medicines and smell testing when needed. Imaging is not required for everyone. Treatment depends on the cause; the degree and timing of improvement vary.
Check smoke and gas alarms and food expiry dates. Smell changes with head injury, new neurological symptoms or one-sided bloody discharge need urgent assessment.
This information does not replace an individual consultation. Diagnosis and treatment depend on a medical assessment.
Consultation and treatment