What are the symptoms of ageusia?

Having ageusia means you can’t distinguish any taste in foods or drinks. You may have other symptoms, too, depending on what condition causes it. These may include:

• High blood pressure (hypertension).
• Nasal congestion.
• Allergies.
• Oral health problems.

What causes loss of taste?

Causes of ageusia range from health conditions and medications to lifestyle-related things, like smoking cigarettes. Anything that interferes with the breakdown of food into chemical signals that your brain recognizes as specific flavors can impact your sense of taste.

Conditions or injuries

Infections, health conditions (including nutritional deficiencies) and injuries that impact structures in your head and neck involved with taste can all lead to ageusia.

Head and neck infections that can cause ageusia include:

• COVID-19. (Most people who develop ageusia as a coronavirus symptom experience a loss of taste and smell.)
• Sinus infection (sinusitis).
• Common cold.
• Influenza (flu).
• Strep throat.
• Salivary gland infections (sialadenitis).

Conditions affecting your mouth and teeth that can lead to loss of taste include:

• Gum (periodontal) disease.
• Tongue inflammation (glossitis).
• Xerostomia (dry mouth).
• Sjögren’s syndrome.
• Burning mouth syndrome.

Conditions or injuries affecting your nerves that may cause ageusia include:

• Diabetes.
• Bell’s palsy.
• Alzheimer’s disease.
• Multiple sclerosis (MS).
• Parkinson’s disease.
• Stroke.

Nerve injury (including from a procedure or radiation therapy).

Vitamin and mineral deficiencies linked to ageusia include:

• Vitamin B12 deficiency.
• Zinc deficiency.

Medications

Hundreds of medications have loss of taste as a potential side effect, including:

• Antibiotics.
• Antivirals.
• Antifungals.
• Antihistamines.
• Antiseizure medicines.
• Tricyclic antidepressants.
• Bronchodilators.
• Chemotherapy drugs.

___
https://my.clevelandclinic.org/health/diseases/21850-ageusia-loss-of-sense-of-taste