Dry Mouth
A dry mouth is more than just an unpleasant sensation. Anyone who regularly suffers from dry mouth knows: it affects speaking, swallowing, sleep – and in the long term, dental health too. Yet dry mouth is often underestimated or dismissed as a harmless side effect. In reality, there is frequently a treatable cause behind it. This article explains how dry mouth develops, what symptoms it causes, what really helps – and when the dentist is the right person to consult.
What is dry mouth? (Xerostomia)
The medical term for dry mouth is xerostomia – derived from the Greek: “xeros” (dry) and “stoma” (mouth). It refers to the subjective feeling of an excessively dry mouth, caused by reduced saliva production or a change in saliva composition.
Saliva is far more than just moisture. It protects the oral mucosa, washes away bacteria and food debris, neutralises acids, supports digestion, and remineralises tooth enamel. When saliva production decreases, this protection is lost – and the teeth and gums become more susceptible to disease. From a dental perspective, dry mouth is therefore a serious issue that requires targeted investigation and treatment.
Causes of dry mouth
Dry mouth is not a condition in its own right, but always a symptom – the consequence of another cause. This may be harmless (not drinking enough, sleeping with an open mouth) or may indicate a systemic disease. The most common causes at a glance:
Medications as the most common cause
By far the most common cause of dry mouth is medication. Hundreds of active ingredients are considered potential triggers – including many that are widely used in everyday life:
- Antihypertensives (blood pressure medications) such as candesartan or bisoprolol
- Antidepressants and antipsychotics, e.g. escitalopram or tricyclic antidepressants
- Antihistamines (allergy medications)
- Diuretics (water tablets)
- Proton pump inhibitors such as pantoprazole
- Painkillers and muscle relaxants
The saliva-inhibiting effect of these medications is often a direct side effect – they block certain receptors responsible for saliva production. Anyone who takes medication regularly and suffers from dry mouth should discuss this with their prescribing doctor – alternatives or dosage adjustments are often available. The dentist can treat and monitor the oral consequences in these cases.
Diseases and systemic causes
Various diseases can affect the salivary glands directly or indirectly:
- Sjögren's syndrome: An autoimmune disease in which the immune system attacks the salivary and lacrimal glands. Dry mouth is a key symptom.
- Diabetes mellitus: Elevated blood sugar levels affect salivary gland function and simultaneously increase the risk of cavities considerably.
- Thyroid disorders: Both overactive and underactive thyroid can cause dry mouth.
- Parkinson's disease: The disease itself as well as the medications used to treat it can reduce saliva production.
- Radiation to the head and neck area: Radiotherapy for tumours can permanently damage the salivary glands – with sometimes severe consequences for dental health.
Dry mouth and mental health / stress
The link between mental health and dry mouth is well documented. Stress, anxiety, and psychological strain activate the sympathetic nervous system – the part of the autonomic nervous system that dominates in stressful situations and reduces saliva production. Chronic stress can thus lead to persistent dry mouth that cannot be remedied by simply drinking more. Burnout, anxiety disorders, and depression are frequently accompanied by dry mouth – often exacerbated by the medications used to treat them.
Dry mouth during menopause
Many women report new onset of dry mouth during menopause. The reason: declining oestrogen levels affect the mucous membranes throughout the body – including in the mouth. The oral mucosa becomes thinner and drier, and saliva production may decrease. Accompanying symptoms often include a burning sensation in the mouth, a furry feeling on the tongue, and increased tooth sensitivity. Whether dry mouth improves after menopause varies from person to person – in many women the symptom stabilises, while in others it persists.
Dry mouth during pregnancy
During pregnancy – particularly in early pregnancy – many women report increased dry mouth. Hormonal changes, increased fluid requirements, and morning sickness with reduced fluid intake all play a role. At the same time, the risk of cavities changes during pregnancy, which is why regular dental check-ups are particularly important.
Dry mouth in older age
With advancing age, saliva production decreases in many people – partly due to age-related changes in the salivary glands, but above all due to the increase in illnesses and the associated medication use. Older people take an average of several medications simultaneously, many of which inhibit saliva production. Dry mouth in older age is therefore very common and should be monitored by a dentist, as the risk of cavities and periodontitis is already elevated during this stage of life.
Symptoms: How dry mouth manifests itself
Dry mouth is not always immediately recognisable as such. Symptoms can develop gradually and are often not initially associated with a lack of saliva:
- A furry or sticky feeling on the tongue and oral mucosa
- Bad breath that persists despite good oral hygiene
- Difficulty swallowing, especially with dry foods
- Speech problems – lips stick together, pronunciation becomes unclear
- A burning sensation in the mouth or on the tongue
- Cracked lips and cracked corners of the mouth
- Altered taste perception
- Increased susceptibility to cavities – often the first sign noticed by the dentist
Dry mouth and fungal infection
A frequently overlooked symptom of dry mouth is the development of oral thrush – a fungal infection caused by Candida albicans. Saliva contains antimicrobial proteins that control the growth of fungi and bacteria in the oral cavity. Without this protection, Candida can spread unchecked. Typical signs include whitish coatings on the tongue or the inner cheek mucosa, a burning sensation, and altered taste perception. Anyone suffering from chronic dry mouth should watch for this symptom and have it assessed by a dentist.
Dry mouth at night – a particular problem
Nocturnal dry mouth is one of the most common complaints reported by patients. The reason lies in normal physiology: saliva production is significantly reduced at night – this is a natural rhythm of the body. Anyone who already produces too little saliva during the day suffers even more at night.
There is an additional factor: mouth breathing. Anyone who breathes through their mouth during sleep – whether due to a blocked nose, snoring, or sleep-related breathing disorders such as sleep apnoea – dries out the mouth even further. Many sufferers wake up at night with an unpleasantly dry, sticky mouth and need to drink before they can go back to sleep.
From a dental perspective, nocturnal dry mouth is particularly problematic: without the protective saliva film, the teeth are left unprotected for hours during the night. The risk of cavities – particularly root caries – and gum inflammation increases considerably. Anyone who regularly suffers from nocturnal dry mouth should raise this at their next dental appointment.
Consequences for the teeth – why the dentist matters
Dry mouth is not just unpleasant – it has direct and measurable consequences for dental health. The dentist is not only the one who treats the resulting damage, but often also the first to recognise dry mouth – even before the patient has consciously perceived it as a problem.
- Cavities: Saliva neutralises acids, remineralises tooth enamel, and washes away bacteria. Without it, cavities develop – often in unusual locations such as the tooth roots or the incisal edges.
- Periodontitis: Dry mouth promotes the spread of bacteria in the gingival sulcus and increases the risk of gum inflammation and periodontitis.
- Problems with dental prostheses and dentures: Saliva acts as a natural adhesive for removable dental prostheses. With dry mouth, the denture fits poorly, causes pressure, and creates sores on the mucosa.
- Mucosal changes: Chronic dryness irritates the oral mucosa, making it more susceptible to inflammation and fungal infections.
Regular check-ups with the dentist as well as professional dental hygiene are particularly important for dry mouth – ideally every three to four months, in order to take early action.
What helps against dry mouth? – Home remedies and measures
The treatment of dry mouth depends on the cause. If a systemic disease or medication is the trigger, the cause must be addressed by the doctor. At the same time, however, there are many measures that can relieve symptoms and protect the teeth – and that anyone can implement themselves.
Home remedies for dry mouth
Simple home remedies can significantly relieve the symptoms of dry mouth:
- Drink enough water: Sounds obvious, but is often neglected. At least 1.5 to 2 litres daily – ideally distributed throughout the day in small sips.
- Sugar-free chewing gum or sweets: Stimulate saliva production mechanically. Important: always sugar-free, as the risk of cavities is already increased with dry mouth.
- Herbal teas: Certain teas such as sage (antibacterial) or chamomile (anti-inflammatory) can soothe the oral mucosa. Drink tea without sugar and not too hot.
- Reduce mouth breathing: Anyone who breathes through their mouth at night can, after medical consultation, try using a lip tape (mouth taping). An ENT assessment (nasal septum, polyps) is advisable for persistent mouth breathing.
- Reduce alcohol and caffeine: Both substances have a dehydrating effect and can worsen dry mouth.
- Increase humidity: A humidifier in the bedroom can noticeably relieve nocturnal dry mouth.
Saliva substitutes and moisturising products
When the body’s own saliva production is insufficient, saliva substitutes can help. They do not fully replace saliva, but they reliably relieve symptoms:
- Mouth sprays: Practical for on the go and at night on the bedside table. They usually contain hydroxyethylcellulose or glycerine as moisture-binding agents.
- Lozenges: Stimulate saliva production through sucking while simultaneously moisturising the oral mucosa. Well suited for daytime use.
- Mouthwashes: Specially developed mouthwashes for dry mouth (alcohol-free) can soothe and protect the mucosa.
- Gels: Moisturising gels applied to the mucosa are particularly suitable for night-time use, when stimulation of saliva production is not possible.
Products from the pharmacy (e.g. Biotène, GUM Hydral, Xerostom) are specifically developed for dry mouth and are generally well tolerated.
Toothpaste for dry mouth
Anyone suffering from dry mouth should pay particular attention to their choice of toothpaste:
- Special toothpastes for dry mouth, e.g. containing enzymes such as lactoferrin or lysozyme, support the natural salivary protection.
- No toothpastes with sodium lauryl sulphate (SLS): This surfactant, found in many standard toothpastes, can further dry out and irritate the oral mucosa.
- Hydroxyapatite toothpastes: A gentle, remineralising option that strengthens tooth substance and does not burden the mucosa.
Dry mouth caused by medication – what to do?
If a medication is causing dry mouth, the following steps are advisable:
- Inform your doctor: There are often alternative active ingredients or formulations that have less impact on saliva production.
- Adjust the timing of the dose: In some cases, taking the medication at a different time can reduce symptoms.
- Pilocarpine: In severe cases – e.g. after radiation or in Sjögren’s syndrome – the doctor may prescribe pilocarpine, an active ingredient that directly stimulates the salivary glands.
- Dental support: Regardless, a dentist should regularly monitor the effects on teeth and mucosa and take preventive action.
Probiotics and natural approaches
Research into probiotics for dry mouth is still in its early stages, but promising. Certain Lactobacillus strains appear to positively influence the oral flora and reduce inflammatory reactions – which can also indirectly relieve the symptoms of dry mouth. Essential oils (tea tree oil, peppermint) and oxygen-based mouthwashes are also being discussed, as they reduce the bacterial load in the oral cavity and thus counteract bad breath and inflammation. As a standalone measure, these approaches do not replace dental treatment, but they can be a useful complement.
Med. dent. Ayleen Haase
Do you suffer from dry mouth and want to protect your teeth effectively? Book an appointment – we are happy to advise you.
Frequently asked questions about dry mouth
Dry mouth raises many questions – from the cause to the right treatment. We have compiled the most common answers here for you.
There is no universal “best remedy” – because dry mouth has many possible causes, and treatment depends on the underlying one. For immediate relief, sugar-free chewing gum, mouth sprays, or lozenges from the pharmacy are well suited. In the long term, it is crucial to treat the cause – that is the doctor’s responsibility. The dentist provides parallel support and treats any resulting damage to teeth and mucosa before it worsens.
At night, the body produces less saliva – this is physiologically normal. Those who additionally breathe through their mouth or take certain medications suffer particularly badly at night. Helpful measures include mouth sprays or gels on the bedside table, a humidifier in the bedroom, and – if mouth breathing is suspected – an ENT assessment.
Dry mouth itself is rarely directly dangerous, but its consequences can be. Increased risk of cavities, periodontitis, mucosal infections, and difficulty swallowing can significantly impair quality of life and dental health in the long term. Furthermore, chronic dry mouth can be an indication of an underlying condition requiring treatment.
Both can be important contacts – depending on the situation:
- See the dentist: If you notice that your teeth are developing cavities more frequently despite good care, your gums are becoming more sensitive, or you suffer from bad breath. The dentist can treat the oral consequences of dry mouth and specifically protect the teeth.
- See the doctor: If the dry mouth is connected to medications, a known illness, or systemic complaints. The doctor can investigate and treat the cause.
Close collaboration between both is often beneficial.
Morning dry mouth that disappears after the first glass of water is often harmless – usually a result of mouth breathing during sleep or the overnight pause in saliva production. However, if the feeling of dryness persists throughout the day or worsens over weeks, the cause should be investigated.
Further information
Here, you can find additional information on the topic to gain a deeper insight.