close up of child's mouth displaying symptoms of mumps
Sean Cate
Sean Cate
June 14, 2024 ·  4 min read

Having a Bad Taste in Your Mouth is a Common Sign of This Oral Condition

A bad taste in your mouth can be more than just an unpleasant experience. It might indicate an underlying oral condition known as parotitis. Parotitis is the inflammation of the parotid glands, the two large salivary glands responsible for producing a significant portion of your saliva. Let’s explore the causes, types, symptoms, and treatments of parotitis, and shed light on why this condition can leave a bad taste in your mouth.

Understanding Parotitis

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Parotitis is the inflammation of one or both parotid glands, which are located in each cheek over the jaw and in front of the ears. These glands are crucial as they produce about 50% of the saliva in your mouth. Saliva plays a vital role in maintaining oral health, aiding digestion, and protecting against infections by containing electrolytes and enzymes such as salivary amylase, which helps break down carbohydrates.1

Read More: 10 Cancer-Linked Foods You Should Never Put in Your Mouth Again

Types of Parotitis

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Parotitis can be classified into several types based on the cause and the nature of the inflammation:

  • Acute Bacterial Parotitis: Often caused by a bacterial infection, particularly Staphylococcus aureus, this type is more common in older adults but can affect individuals of any age.2
  • Chronic Bacterial Parotitis: This may come from salivary duct stones, injuries, or decreased salivary flow, leading to recurring infections and inflammation.
  • Acute Viral Parotitis: Typically caused by viral infections such as mumps, this type can also be the result of influenza or enteroviruses.
  • Chronic Parotitis: Often linked to autoimmune diseases like rheumatoid arthritis and Sjögren’s syndrome, this type dishes out persistent and recurring inflammation.

Symptoms of Parotitis

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The primary symptom of parotitis is swollen parotid glands. Other common symptoms include:

  • Sore Throat and Fever: Infections can cause general discomfort and fever.
  • Cloudy Saliva and Bad Taste: An abnormal taste in the mouth and cloudy-appearing saliva are key indicators of gland issues.
  • Redness and Pain: Especially over the upper neck or side of the face, which can worsen from any chewing.
  • Chronic Swelling and Lumps: Particularly in cases related to chronic conditions or tuberculosis.

Causes of Parotitis

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Parotitis can arise from various factors:

  • Bacterial Infections: Common bacteria include Staphylococcus aureus, Streptococcus, and E. coli.
  • Viral Infections: Mumps is a notable cause, but other viruses like influenza and HIV can also trigger parotitis.
  • Decreased Salivary Flow: Often due to dehydration, certain medications, or underlying health conditions.
  • Autoimmune Disorders: Conditions like Sjögren’s syndrome and rheumatoid arthritis can lead to chronic inflammation of the salivary glands.
  • Salivary Duct Stones: These can block saliva flow and cause bacterial buildup.

Read More: Why Does Eating Spinach Make Your Mouth Feel Weird?


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If you suspect you have parotitis, it is crucial to seek medical advice. Diagnosis typically involves:

  • Physical Examination: To check for enlarged glands and drainage in the mouth.
  • Imaging Tests: CT scans, MRI, or ultrasounds may be used to detect stones or abscesses in the salivary glands.
  • Sialendoscopy: A specialized technique using a tiny camera to diagnose and treat salivary gland issues.
  • Laboratory Tests: If there is pus or drainage, samples may be tested for bacterial infections.


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For milder cases of parotitis, doctors might recommend:

  • Hydration: Drinking plenty of water to keep the saliva flowing.
  • Warm Compress: To reduce swelling and pain.
  • Gland Massage: Gentle massages can help alleviate symptoms.
  • Sialagogues: Substances like sour candies to promote saliva production.

Medical Treatments

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For more severe cases, particularly bacterial infections, treatments may include:

  • Antibiotics: Antistaphylococcal antibiotics are commonly prescribed.
  • Pain Relief: Medications like acetaminophen or ibuprofen can reduce pain and inflammation.
  • IV Hydration: For severe cases of dehydration.

For any parotitis caused by underlying health conditions, managing the primary disease is crucial. In cases of autoimmune diseases or chronic conditions, ongoing treatment and monitoring are necessary to control inflammation and prevent recurrence. Viral parotitis caused by mumps virus can be mostly prevented through childhood vaccination.


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While it is not always possible to prevent parotitis, certain practices can reduce your risk:

  • Good Oral Hygiene: Regular brushing and flossing to prevent bacterial growth.
  • Adequate Hydration: Drinking sufficient water daily to maintain salivary flow.
  • Avoiding Smoking: Reducing or eliminating smoking can lower the risk of salivary gland inflammation.


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Certain factors increase the likelihood of developing acute bacterial parotitis, including:

  • Dehydration and Malnutrition: Common in older adults or those recovering from surgery.
  • Medications: Some drugs reduce salivary flow, increasing the risk of infection.
  • Dental Infections and Cystic Fibrosis: These conditions also heighten the risk of parotitis.


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If left untreated, parotitis can lead to serious complications, such as:

  • Chronic Bacterial Parotitis: Persistent infections can cause long-term glandular damage.
  • Xerostomia (Dry Mouth): A chronic condition that can exacerbate parotitis.
  • Facial Nerve Injury: Rare but possible during surgery or due to chronic inflammation.
  • Septic Thrombophlebitis: An extremely rare but life-threatening condition involving blood clots and vein inflammation.


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A bad taste in your mouth might be more than just a minor inconvenience. It could be a sign of parotitis, an inflammation of the parotid glands. Understanding the causes, symptoms, and treatments is crucial for maintaining oral health and preventing complications. If you suspect you have parotitis, seeking prompt medical attention is essential. Maintaining good oral hygiene, hydration, and avoiding smoking are practical steps to reduce the risk of developing this condition.

Read More: Mouth warnings to look for if your vitamin B12 levels are low


  1. Parotitis (Parotid Gland Swelling).” Health. Laura Schober. April 27, 2024.
  2. Mumps.” Penn Medicine