Bad Breath
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Reviewed By:
Yoshinori Abe, MD (Internal medicine)
Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.
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Smell from the tongue
Smell from the mouth
My breath smells bad
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Developed by doctors.
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Content updated on Jan 4, 2023
About the symptom
Bad breath or halitosis is a persistent, unpleasant odour in exhaled breath. It is usually not significant but could be due to certain foods, poor oral hygiene and certain medical conditions.
When to see a doctor
Seek professional care if you experience any of the following symptoms
Fever
Dysphagia
Chest pain during swallowing
Possible causes
- Dental caries
Dental caries are permanently damaged areas in the teeth that develop into tiny holes. Common causes include sipping sugary drinks / eating sweets/ snacking often, poor oral hygiene and bacterial accumulation.
- Candidiasis (oral, hands and feet)
Normal human skin contains bacteria and fungi. Candidiasis happens when the fungus overgrows and invades the skin. Risk factors include warm moist environments, and a weakened immune system.
- Acute tonsillitis / pharyngitis
Infection of the tonsils and pharynx (back of the mouth), either by viruses or bacteria.
- Stomatitis
Related serious diseases
- Uremia / chronic renal failure
Severe decrease in kidney function. There are many causes of this, from repeated damage due to infections, diabetes, high blood pressure to autoimmunity (body's immune system attacking itself).
Questions your doctor may ask about this symptom
Your doctor may ask these questions to check for this symptom
Do you feel that you have bad breath?
Do you have headaches or does your head feel heavy?
Do you have any skin problems?
Do you feel any numbness or change in sensation?
Do you have a fever?
Other Related Symptoms
Similar symptoms or complaints
Symptoms from the same body system / part
Symptoms treated by the same specialty
Reviewed By:
Yoshinori Abe, MD (Internal medicine)
Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.
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Developed by doctors.
Ubie is supervised by 50+ medical experts worldwide
Seiji Kanazawa, MD, PHD
Obstetrics and gynecology (OBGYN)
National Center for Child Health and Development, Japan