Prof. Dr. Ahmet Özdoğan
ENT — General

Olfactory Training

Olfactory training is a standardised four-odour protocol of rose, eucalyptus, lemon and clove, practised as two 30-second mindful sniffing sessions daily, harnessing olfactory neuroplasticity with proven efficacy in post-viral and post-COVID anosmia.

Olfactory Training becomes clinically meaningful in general ENT when it matches the patient's actual complaint. Olfactory training is a standardised four-odour protocol of rose, eucalyptus, lemon and clove, practised as two 30-second mindful sniffing sessions daily, harnessing olfactory neuroplasticity with proven efficacy in post-viral and post-COVID anosmia. Side difference, pace of change, response to previous care and daily-life impact reduce unnecessary interpretation when documented separately. this term assessment brings nasal-sinus symptoms, the finding throat-tonsil context, this entry upper-airway impact and the clinical point sleep links into one ENT frame. The aim is patient education while leaving the decision to examination. For the dictionary entry, the existing summary aims to connect the reported complaint with examination findings: The protocol covers four standard odours representing Henning's olfactory prism: phenyl ethanol (rose), 1,8-cineole (eucalyptus), citral (lemon) and eugenol (clove). The topic is therefore read with clinical context, not as a one-line definition.

Assessment of this topic starts with a detailed history. this term onset, pace of change, one-sided symptoms, infection context, trauma history, allergy or reflux pattern, smoking exposure and occupational load are reviewed separately. the finding review may combine ENT examination, the clinical point endoscopic assessment, the dictionary entry oral cavity-oropharynx inspection and this topic audiological testing when useful. this term decisions record fever, the finding pain-bleeding pattern, this entry hearing or nasal blockage, the clinical point sleep impact and the dictionary entry infection recurrence separately. In this topic, the clinical aim is to prove the finding that explains the complaint and separate similar-looking conditions: Assessment using the Sniffin' Sticks TDI score is performed at baseline and at 12 weeks. Tests are requested when they help make that distinction. Test selection follows the clinical question left unanswered by examination; the same test package is not right for every patient.

In this term management, the fastest or most aggressive the dictionary entry option is not automatically the best one. Diagnostic certainty, functional gain, recovery burden and risk-benefit balance are reviewed in sequence. this topic planning discusses medical treatment, this term allergy control, the finding endoscopic procedures, this entry adenoid-tonsil strategy or the clinical point airway surgery by indication. Management of the dictionary entry is individualized according to symptom duration, examination findings, functional impact, patient expectations, prior treatment response and imaging or laboratory results when needed. When surgery or a procedure enters the discussion for this topic, expected change and possible limits are described clearly.

The review plan for this term can be spaced out when risk falls and tightened when uncertainty or warning signs increase. the finding follow-up compares pain, this topic nasal openness, this term sleep quality, the finding hearing impact and this entry infection recurrence over time. Safe communication about the clinical point helps patients notice risky symptoms early without increasing anxiety and supports adherence to follow-up advice. the dictionary entry changes involving this topic follow-up with high fever, increasing pain, worsening blockage or recurrent infection are documented for timing discussion.

A this term file becomes clearer when onset, severity, triggers, previous operations, family history and functional expectations are written separately; examination then connects these details with diagnostic and treatment safety.

In the consultation note, the finding context: current symptoms are not mixed with report wording; timing can be discussed more consistently; For terminology clarity, olfactory patient question, training clinical context stay in the same context.

Diagnosis

Sniffin' Sticks TDI score: normal >30.3; hyposmia 16.5–30.3; anosmia <16.5. UPSIT 40 items: normal ≥34/40. Baseline and 12-week follow-up assessments require a standardised protocol. MRI olfactory bulb volume measurement monitors structural change in persistent cases. Distinguishing post-COVID, post-traumatic and idiopathic anosmia affects treatment selection; skull-base MRI and neurology consultation may be needed.

Treatment

Conscious sniffing for 30 seconds per odour is performed twice daily (morning and evening) for a minimum of 12 weeks, ideally up to 6 months. High-concentration essential oils are mandatory; low-concentration products may be ineffective. An extended protocol can be applied by changing the odour set at 12 weeks. Alpha-lipoic acid 600 mg/day and omega-3 can be added as adjuncts; nasal steroid spray supports training when the aetiology is inflammatory.

Outcomes and Follow-up

Twelve weeks of olfactory training improves objective outcomes by 28% compared with 6% spontaneous recovery in post-viral anosmia. Post-COVID responses are comparable to post-viral outcomes. Longer training (≥6 months) yields better results than shorter courses. Parosmia frequently precedes smell recovery and may be considered a harbinger of improvement. Re-evaluation by ENT is recommended if there is no response at 12 weeks.

When to Seek Care

ENT referral criteria include anosmia/hyposmia persisting ≥6 weeks after viral URTI or COVID-19, post-traumatic smell loss, and no improvement after a 12-week training trial. In elderly patients or those with concurrent neurological signs (headache, visual change, cognitive change), a neurological cause must be excluded.

Frequently asked questions

What is Olfactory Training?
Olfactory training is a standardised four-odour protocol of rose, eucalyptus, lemon and clove, practised as two 30-second mindful sniffing sessions daily, harnessing olfactory neuroplasticity with proven efficacy in post-viral and post-COVID anosmia. Olfactory Training becomes clinically meaningful in general ENT when it matches the patient's actual complaint.
When is Olfactory Training clinically important?
Assessment of this topic starts with a detailed history. It is assessed together with examination, endoscopy or imaging in nasal, throat, sinus and upper-airway complaints.
When is ENT assessment relevant for Olfactory Training?
ENT assessment becomes relevant if symptoms last more than a few weeks, become one-sided or progressive, or are accompanied by breathing, swallowing, voice, hearing or neck-mass findings.
What information helps assessment of Olfactory Training?
It is useful to note when symptoms started, which side is affected, previous operations or treatments, current medication, imaging and test reports, and the effect on daily life. It is assessed together with examination, endoscopy or imaging in nasal, throat, sinus and upper-airway complaints.

Learn more about this procedure

Detailed guide from Prof. Dr. Özdoğan's clinic

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References

This glossary entry is for informational purposes only and does not constitute medical advice. Consult a qualified specialist for diagnosis and treatment.

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