Toothache, mouth symptoms, dry mouth and halitosis

Identify dental sepsis and airway risk

Dental pain may arise from caries, pulp inflammation, periodontal disease, a cracked tooth or abscess. Ask about duration, thermal sensitivity, biting pain, swelling, fever and prior dental treatment. Examine teeth, gingiva, floor of mouth and facial/neck tissues, with observations and airway assessment when infection is suspected. Marked facial or neck swelling, trismus, drooling, tongue elevation, difficulty swallowing or breathing raises deep-space infection. Call urgent dental/maxillofacial/ENT and airway services rather than sending an unstable patient away with oral antibiotics.

Antibiotics do not replace drainage, root-canal treatment or extraction of the dental source. A localised dental problem in a stable person needs prompt dental care and analgesia; systemic illness, spreading infection, immunocompromise or delayed access may change the antimicrobial plan under local guidance. Review allergies, renal function and drug interactions. Repeated antibiotic courses without definitive source treatment select resistance and can postpone needed intervention. Explain the difference between temporary symptom control and removal of the cause.

Pain and access

Use suitable simple analgesia, often an NSAID if safe and paracetamol where appropriate. Check renal, GI, cardiovascular and pregnancy risks before recommending a regimen. Opioids are not a default solution to inaccessible dental care. Assist with public, urgent or community dental pathways and document whether the patient can access them. Consider referred pain: jaw pain with exertion, chest discomfort or autonomic symptoms may be cardiac, while sinus and neuralgic pain can also resemble toothache. A visible cavity does not prove it explains every symptom.

Dental trauma needs a prompt tooth-specific pathway. An avulsed permanent tooth is time-sensitive and should be handled by the crown, not scrubbed by the root, with urgent dental advice about reimplantation or transport medium. A primary tooth should not be reimplanted. Assess associated head injury, aspiration and soft-tissue wounds. Do not assume every injured tooth is permanent in a young child. Ask about tetanus for contaminated wounds and use safeguarding assessment when the injury history or pattern is concerning.

Bleeding gums and ulcers

Plaque-related gingivitis is common, but bleeding can also reflect medicines, thrombocytopenia, haematological disease or nutritional deficiency. Examine the extent, obtain a bleeding history and look for bruising, pallor, fever or systemic illness. Dental hygiene and periodontal review address local disease; significant spontaneous bleeding or systemic signs warrant medical investigation. A normal-looking tooth does not exclude gum pathology. Avoid attributing all bleeding to poor brushing or moralising about hygiene when illness, disability or access barriers contribute.

Aphthous ulcers are common and usually heal, but persistent ulcers, induration, a neck mass, weight loss or tobacco/alcohol risk raises oral cancer. Arrange timely specialist assessment rather than repeatedly prescribing mouthwash. Recurrent ulcers may occur with coeliac disease, IBD, deficiency or systemic inflammation; investigate according to associated findings rather than ordering every test for an isolated typical ulcer. Oral candidiasis can follow inhaled steroids, antibiotics, immunosuppression or denture use. Address technique, rinsing and the underlying risk as well as antifungal treatment.

Dry mouth and bad breath

Dry mouth can follow anticholinergic medicines, dehydration, radiotherapy, diabetes or autoimmune disease. Ask about eye dryness, salivary-gland swelling, dental decay and functional trouble swallowing dry food. Review the medication list before adding more drugs. Support hydration where appropriate, salivary substitutes or stimulation, oral hygiene and dental prevention. Severe xerostomia increases caries, infection and nutritional problems. Sjögren disease is considered in a systemic sicca pattern, but a symptom alone does not establish the autoimmune diagnosis.

Halitosis commonly arises within the mouth, including periodontal disease, tongue coating or dry mouth. Examine oral causes and ask about dental care, smoking and nasal symptoms before assuming a rare gastric disorder. Persistent symptoms with dysphagia, weight loss or other warning signs need targeted assessment. Avoid routine extensive GI testing solely for bad breath when the oral examination has not been performed. Discuss the concern sensitively because it can cause embarrassment and social withdrawal; unnecessary reassurance without an examination is also unhelpful.

A practical consultation

A patient with dental swelling and fever needs assessment of spread and airway, antimicrobial treatment when indicated, and definitive dental source control. A patient with a six-week indurated lateral tongue ulcer needs urgent cancer assessment, not another empiric topical course. A patient taking several anticholinergic medicines with dry mouth and new decay benefits from medication review and dental prevention. The next best action depends on anatomy, systemic illness and duration rather than simply the reported pain intensity.

For children and adults with disability, ask what assists examination and communication, and use appropriate support or referral rather than forcing an unsafe examination. Document teeth/sites and the extent of swelling clearly, including examination limitations. If dental access is delayed, provide explicit escalation signs and a realistic interim plan; difficulty swallowing saliva, breathing changes or rapidly spreading swelling should trigger urgent emergency care.

Queensland Primary Clinical Care Manual: general presentations and NSW ENT emergency criteria.

Review checkpoints

• Antibiotics alone do not provide definitive treatment of an infected tooth.
• Spreading floor-of-mouth infection can threaten the airway.
• Persistent oral ulceration or a suspicious lesion requires further assessment.