Bad Breath (Halitosis)
Bad breath is an unpleasant smell from the mouth. It is very common and usually caused by bacteria in the mouth, but can sometimes signal another problem.
Causes & risk factors
- Poor oral hygiene and plaque build-up
- Bacteria coating the tongue
- Gum disease
- Dry mouth
- Strong foods, smoking or alcohol
- Sinus, throat or stomach problems
Common symptoms
- Persistent unpleasant mouth odour
- A bad taste in the mouth
- Coated or white tongue
- Dry mouth
- Others noticing the smell
Tests & diagnosis
- Dental and gum examination
- Assessment of the tongue and mouth
- Checking for gum disease or decay
Treatment & management
- Brushing twice daily and cleaning between teeth
- Cleaning the tongue
- Staying well hydrated
- Treating gum disease or decay
- Cutting down on smoking, alcohol and strong foods
- Regular dental check-ups
When to see a doctor urgently
- Bad breath that persists despite good oral care
- Bad breath with sore, bleeding gums
- A constant bad taste
- Bad breath with other symptoms like heartburn or a blocked nose
Not a diagnosis. MedDroid gives general educational information about bad breath (halitosis). It cannot examine you, diagnose or prescribe — always confirm with a qualified doctor.
Frequently asked questions
Why do I have bad breath even after brushing?
Bacteria on the tongue, gum disease or a dry mouth can cause lasting bad breath. Cleaning the tongue and seeing a dentist for gum problems often helps.
Can bad breath signal another illness?
Sometimes. Sinus infections, throat problems, acid reflux or diabetes can cause bad breath, so persistent odour with other symptoms should be checked.
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MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.