Mouth and jaw guide
5 min readDry mouth
Dry mouth can feel uncomfortable and may increase the risk of tooth decay. Persistent dry mouth should be discussed with a dentist, GP or pharmacist.
Dry mouth can feel like not having enough saliva. It may cause thirst, sticky saliva, soreness, bad breath, altered taste, difficulty eating dry foods or increased dental problems.
Dry mouth can be linked with medicines, dehydration, mouth breathing, health conditions or treatment side effects. Do not stop prescribed medicine without medical advice.
At a glance
Notice dryness
Saliva changes
- Dry mouth may feel sticky, sore or thirsty.
- It can make eating, speaking, swallowing or wearing dentures harder.
- It may contribute to tooth decay risk.
Seek advice
Persistent dryness
- Discuss persistent dry mouth with a dentist, GP or pharmacist.
- Ask whether medicines or health conditions could be contributing.
- Keep regular dental checks if your mouth is often dry.
Urgent signs
Prompt care
- Urgent dental advice is needed if dry mouth is linked with severe pain, swelling or infection signs.
- Use medical advice promptly if dehydration or sudden illness is suspected.
- Emergency care is needed for breathing or swallowing difficulty.
Contents
Saliva helps protect the mouth
Saliva helps with comfort, swallowing and protection against tooth decay. Persistent dry mouth can make oral hygiene and dental prevention more important.
Possible causes or contributing factors
- Medicines, dehydration, smoking, alcohol or caffeine.
- Mouth breathing, anxiety or snoring.
- Health conditions, salivary gland problems or treatment side effects.
- Denture irritation or oral infection in some cases.
What you can do now
- Sip water regularly and avoid triggers that worsen dryness.
- Keep teeth, gums, tongue and dentures clean.
- Book dental advice if dryness is persistent or dental problems are increasing.
What not to do
- Do not stop prescribed medicine without advice from a doctor or pharmacist.
- Do not rely on sugary sweets or drinks to manage dryness.
- Do not ignore new decay, mouth soreness or bad breath.
When to contact a dentist
- Dry mouth is persistent or affects eating, speaking or dentures.
- You notice more decay, sensitivity, bad breath or mouth soreness.
- You need advice about fluoride, saliva substitutes or prevention.
When urgent dental care is needed
- Dry mouth appears with severe dental pain, swelling or pus.
- Mouth soreness makes eating or drinking difficult.
- There are signs of dental abscess or facial swelling.
When to call 999 or go to A&E
What a dentist or relevant professional may assess or do
- Assess teeth, gums, saliva, dentures and decay risk.
- Discuss prevention and products that may help comfort or protection.
- Suggest GP or pharmacist review if medicines or health conditions may contribute.
Frequently asked questions
Can dry mouth affect teeth?
Yes. A dry mouth may increase tooth decay risk, so dental prevention and regular checks matter.
Can medicines cause dry mouth?
Some medicines can contribute. Do not stop prescribed medicines without advice; speak to a pharmacist, GP or dentist.
Is dry mouth urgent?
Usually it is not an emergency, but urgent advice is needed if it appears with severe pain, swelling, infection signs or difficulty swallowing.
Need dry mouth guidance?
Browse Odenta mouth and jaw guidance and arrange dental or medical advice if dryness is persistent or linked with dental problems.
Browse mouth and jaw guidesOfficial sources
These links open external official guidance pages for further help.
Content reviewed by Dr Majid Saeed · 13 July 2026
References used for this guide are listed above.
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