Nearly 25% of adults older than 40 years experience measurable smell impairment according to the National Institute on Deafness and Other Communication Disorders (NIDCD). Anosmia refers to complete loss of smell that may develop suddenly or gradually depending on the underlying condition. Common triggers include viral infections, sinus disease, nasal blockage, allergies, head injury, and neurological disorders.
Anosmia also affects taste perception because smell contributes significantly to flavor recognition. Many patients notice reduced appetite, difficulty identifying spoiled food, or inability to detect smoke and gas leaks. Temporary smell loss often develops after colds, flu, or COVID-19 infection, while chronic anosmia may indicate sinus disease or nerve-related conditions.
In Hindi, anosmia meaning is “सूंघने की क्षमता का पूरी तरह खत्म होना.” ENT specialists in Delhi commonly evaluate anosmia using nasal examination, smell identification tests, and imaging studies when symptoms persist.
Treatment for anosmia depends on the cause. ENT specialists in Delhi may recommend nasal sprays, allergy management, sinus treatment, smell training exercises, or further neurological evaluation. Patients with smell loss lasting longer than 2 weeks should seek medical assessment to identify the underlying condition early.
What Is Anosmia?
Patients with anosmia often struggle to recognize food aromas, smoke, gas leaks, and spoiled food. Many people also notice reduced taste perception because smell directly affects flavor recognition. Some patients develop sudden smell loss after viral infections, while others experience gradual decline linked to nasal or neurological conditions.
ENT specialists in Delhi commonly classify anosmia into two categories:
- Temporary anosmia
- Permanent anosmia
Temporary anosmia usually develops after colds, flu, allergies, or COVID-19 infection. Permanent anosmia may occur after severe head injury, nerve damage, nasal tumors, or progressive neurological disorders.
Complete smell loss differs from hyposmia, which refers to partial reduction in smell sensitivity. ENT specialists in Delhi evaluate both conditions because treatment depends on the exact cause and duration of symptoms.
Patients experiencing smell loss for more than 2 weeks should seek ENT evaluation. Persistent anosmia sometimes indicates sinus obstruction, nasal polyps, or neurological disease requiring medical diagnosis.
Symptoms of Anosmia Loss of Smell
Complete smell loss may develop suddenly or gradually depending on the underlying condition. Patients with anosmia often fail to detect common odors such as food aroma, perfume, smoke, or gas leaks.
Common symptoms of anosmia include:
- Complete inability to smell odors
- Reduced taste perception
- Difficulty identifying spoiled food
- Loss of appetite
- Nasal congestion
- Sinus pressure
- Altered food flavor recognition
Many patients in Delhi first notice anosmia after viral infections, seasonal allergies, or sinus blockage. Some people experience isolated smell loss, while others develop additional symptoms such as headache, fever, nasal discharge, or breathing difficulty.
COVID-19 related anosmia frequently appears suddenly without severe nasal blockage. Patients may lose smell and taste within a few days of infection. Viral smell loss usually improves gradually, but persistent symptoms sometimes require ENT evaluation.
Common Causes of Anosmia in Delhi Patients
Upper respiratory infections remain one of the leading causes of temporary anosmia in adults according to NIDCD clinical guidance. Patients in Delhi commonly develop smell loss after viral infections, sinus inflammation, allergies, or nasal blockage. Common causes of anosmia include:
Viral Infections
Cold, flu, and COVID-19 infection frequently damage the olfactory receptors responsible for smell detection. Many patients notice sudden smell loss during or after respiratory illness. Viral-related anosmia often improves gradually within weeks, although some cases persist longer.
Sinus Infection and Nasal Congestion
Chronic sinusitis blocks airflow to the smell receptors inside the nasal cavity. Patients with sinus infection often experience nasal pressure, thick mucus discharge, facial pain, and reduced smell sensitivity.
Nasal Polyps
Nasal polyps are soft tissue growths that obstruct airflow inside the nose. Large polyps prevent odor molecules from reaching the olfactory nerves, causing partial or complete smell loss.
Allergic Rhinitis
Seasonal allergies and dust exposure frequently trigger nasal swelling and congestion in Delhi patients. Persistent inflammation reduces smell perception and may worsen during pollution peaks or seasonal weather changes.
Head Injury
Traumatic head injury may damage the olfactory nerves or brain regions involved in smell recognition. Some patients lose smell immediately after trauma, while others develop gradual symptoms.
Neurological Disorders
Parkinson’s disease, Alzheimer’s disease, and certain nerve disorders sometimes cause progressive smell dysfunction. ENT specialists in Delhi may recommend neurological evaluation when anosmia develops without nasal blockage or infection symptoms.
Medication and Chemical Exposure
Certain antibiotics, blood pressure medicines, smoking, and chemical exposure may affect smell function. Long-term exposure to irritants can damage the olfactory lining inside the nose.
Viral Infections and COVID-19 Related Anosmia
Approximately 47% of patients experienced smell dysfunction during acute COVID-19 infection in pooled clinical analyses. Viral infections remain one of the most common causes of temporary anosmia in adults.
Patients in Delhi frequently report sudden smell loss after a cold, flu, or COVID-19 infection. Viral anosmia develops when inflammation affects the olfactory receptors located inside the upper nasal cavity. Some viruses also disrupt nerve signaling responsible for smell recognition.
COVID-19 related anosmia often appears without severe nasal congestion. Many patients lose smell and taste within a few days of infection. Sudden inability to detect food aroma, perfume, smoke, or spices became a common symptom during the COVID-19 pandemic.
Most viral smell loss improves gradually within several weeks. Persistent anosmia may continue for months in some patients due to prolonged inflammation or olfactory nerve injury. ENT specialists in Delhi commonly evaluate patients with smell loss lasting longer than 2 weeks after viral infection.
Nasal Conditions That Cause Loss of Smell
Mayo Clinic identifies nasal polyps, sinus infections, and chronic nasal inflammation among major causes of anosmia. Nasal conditions reduce airflow to the olfactory receptors responsible for detecting odors inside the upper nasal cavity.
Chronic Sinusitis
Chronic sinusitis causes long-term inflammation inside the sinus cavities. Patients often experience:
- Facial pressure
- Thick nasal discharge
- Nasal blockage
- Headache
- Reduced smell sensation
Severe sinus inflammation may completely block smell perception until treatment reduces congestion and infection.
Nasal Polyps
Nasal polyps are non-cancerous tissue growths inside the nasal passages. Large polyps obstruct airflow and interfere with smell detection. Patients with nasal polyps frequently report progressive smell loss, breathing difficulty, and chronic congestion.
Allergic Rhinitis
Dust, pollen, pollution, and weather changes commonly trigger allergic rhinitis in Delhi patients. Repeated allergy flare-ups cause swelling of the nasal lining and temporary anosmia. Many patients notice worsening symptoms during seasonal transitions.
Deviated Nasal Septum
A deviated septum may partially block airflow through one or both nostrils. Severe deviation sometimes contributes to chronic congestion and reduced smell function.
Smell loss lasting longer than 2 weeks requires proper medical evaluation to identify the underlying cause. Anosmia may develop due to viral infections, sinus disease, allergies, nasal polyps, head injury, or neurological disorders. Early diagnosis helps detect chronic nasal conditions and prevents delayed treatment of persistent smell dysfunction.
Patients in Delhi experiencing sudden or long-term smell loss should seek ENT consultation for detailed examination and treatment planning. Nasal endoscopy, smell testing, allergy assessment, and imaging studies help determine the exact cause of anosmia and guide treatment decisions.
Patients with persistent anosmia, sinus blockage, allergy-related smell loss, or post-viral smell dysfunction may benefit from ENT evaluation by Dr. Payal Bhattacharjee. Early consultation helps identify nasal obstruction, chronic sinus disease, and neurological warning signs linked to smell loss.
Patients searching for an ENT doctor in Dwarka or ENT specialist in Delhi should seek medical assessment if they experience:
ENT evaluation may include nasal examination, smell testing, sinus assessment, and treatment planning based on the underlying cause of anosmia.
