What is Dry Mouth?
Dry mouth, medically referred to as xerostomia, happens when the salivary glands in your mouth fail to produce an adequate amount of saliva. This leads to a dry or parched sensation in the mouth. While this condition may be merely bothersome for some, it can have a more significant impact on overall health and well-being for others. Dry mouth affects approximately 10-30% of the population, with an increased prevalence in older adults.
What Are the Symptoms of Dry Mouth?
Saliva plays a vital role in processes such as chewing, tasting, swallowing food, cleaning food particles from the teeth, and controlling bacteria. A lack of saliva can cause symptoms of dry mouth, which can vary depending on the individual. Some people may experience only a few of these symptoms, while others may face many. In more severe cases, dry mouth can interfere with speaking, eating, and swallowing. The symptoms of dry mouth may include:,
- Cracked and dry lips
- Hoarseness, sore throat, or cough
- Thick, sticky, or stringy saliva
- Increased thirst, especially during the night
- Difficulty swallowing food without extra liquid
- Altered taste perception
- Trouble chewing or swallowing, particularly dry foods
- Dryness in the eyes, nose, or corners of the mouth
- A rough, dry tongue, or tongue that sticks to the roof of the mouth
- Bad breath
- Oral thrush (yeast infection)
- Increased plaque buildup and tooth decay
- Difficulty speaking
- Loose dentures
- Bleeding gums
What Causes Dry Mouth?
Dry mouth is not a condition on its own but rather a symptom resulting from various underlying factors, such as health conditions or certain medications. Some of these causes may temporarily affect saliva production, while others can lead to long-term disruptions. The most common causes of dry mouth include:
Salivary Duct Blockages
Blockages in the ducts that carry saliva can reduce its flow, leading to dry mouth.
Other Medical Conditions
Several medical conditions can contribute to dry mouth, including:
- Sjogren’s syndrome
- HIV/AIDS
- Amyloidosis
- Cerebral palsy
- Diabetes
- Parkinson’s disease
- Lupus
- Primary biliary cirrhosis
- Alzheimer’s disease
- Anxiety and depression
- Nasal congestion, which may require mouth breathing during sleep
Drugs and Medications
Over 600 different drugs and medications are linked to dry mouth. These include antihistamines, medications for high blood pressure, sedatives, decongestants, pain relief medications, antidepressants, and even illegal drugs. Cancer treatments, such as chemotherapy and radiotherapy (especially when aimed at the head or neck), can also temporarily lower saliva production.
Infections
Infections like bacterial or viral illnesses, including mumps, may cause dry mouth symptoms.
Dehydration
Inadequate hydration can result in dry mouth. This includes dehydration from insufficient water intake or medical conditions such as kidney failure or chronic diarrhea.
Facial Nerve Damage
Damage to the facial nerve, either due to illness or surgery, can also cause dry mouth.
Tobacco Use
Chewing tobacco or smoking can contribute to dry mouth.
How is Dry Mouth Diagnosed?
If you experience persistent or worsening dry mouth symptoms, it’s important to consult with your doctor. They will examine your mouth and inquire about your medications, drinking habits, eating, and smoking. Your doctor may conduct a simple saliva test, where they will pat the lower lip dry and check how long it takes for saliva to moisten it again. Normally, this should take between 30-60 seconds. As dry mouth is commonly a side effect of other medical conditions, your doctor may also recommend blood tests or imaging scans to investigate why your salivary glands are not functioning properly.
How is Dry Mouth Treated?
The most effective treatment for dry mouth is to address the root cause of the condition. Depending on the underlying issue, your treatment plan may involve11:
- Adjusting medications
- Using antibiotics or antifungal medications to treat infections
- Utilizing oral lubricants and saliva substitutes
- Using dental products enriched with fluoride or calcium to help prevent tooth decay
- Undergoing surgery to remove blockages in the salivary glands
Complications of Dry Mouth?
If left untreated, dry mouth can result in several complications12, including:
- Mouth sores
- Cracked or split lips
- Dry and cracked corners of the mouth
- Increased plaque buildup, tooth decay, and gum disease
- Oral thrush
- Difficulty chewing and swallowing, leading to poor nutrition
- Bad breath
What Else Can You Do?
Although preventing dry mouth may not always be possible, there are several steps you can take to alleviate discomfort and minimize symptoms. These include13,14:
- Avoiding substances that contribute to mouth dryness, such as cigarettes, alcohol, caffeinated drinks, and spicy foods
- Drinking plenty of water throughout the day
- Eating foods with high water content, such as melons (watermelon, honeydew, cantaloupe), celery, cucumbers, zucchini, and leafy greens
- Limiting sugary and acidic foods and drinks that can harm tooth enamel
- Steering clear of hard or crunchy foods that could cause injury to the inside of your mouth
- Applying natural balm or lanolin to your lips to keep them moisturized
- Chewing sugar-free gum between meals to stimulate saliva production
- Brushing and flossing your teeth regularly
- Cleaning dentures frequently and removing them before sleep
- Using a humidifier in your bedroom while sleeping to reduce mouth breathing
Since dry mouth can impact your oral health, it’s important to visit your dentist every six months for a check-up (or more often if recommended). Additionally, seek advice if dentures or other oral devices do not fit correctly.