Bad Breath

Check your symptoms and
find possible causes with AI for free

Reviewed By:

Yoshinori Abe

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.

From our team of 50+ doctors

Please choose the symptom you are most concerned about.

It will help us optimise further questions for you.

By starting the symptom checker, you agree to the Privacy Policy and Terms of Use

Find another symptom

How Ubie can help you

With an easy 3-min questionnaire, Ubie's AI-powered system will generate a free report on possible causes.

  • Over 1,000 medical centers, trained by over 50 doctors, and still improving.

  • Questions are customized to your situation and symptoms

Your symptoms

Input your symptoms

Our AI

Our AI checks your symptoms

Your report

You get your personalized report

Personalized Report

✔︎  When to see a doctor

✔︎  What causes your symptoms

✔︎  Treatment information etc.

People with these symptoms also use Ubie's symptom checker to find possible causes

  • Smell from the tongue

  • Smell from the mouth

  • My breath smells bad

Just 3 minutes.
Developed by doctors.

Learn More

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

Reviewed By:

Yoshinori Abe

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.

From our team of 50+ doctors

Just 3 minutes.
Developed by doctors.

Ubie is supervised by 50+ medical experts worldwide

Shohei Harase

Shohei Harase, MD

Neurology

Kameda Medical Center, Japan

Yu Shirai

Yu Shirai, MD

Psychiatry

Yotsuya Yui Clinic, Japan

Yoshinori Abe

Yoshinori Abe, MD

Internal medicine

Co-founder of Ubie, Inc.

Rohini R

Rohini R, MD

Ear, nose, throat (ENT)

Bayshore Health Centre, India

Seiji Kanazawa

Seiji Kanazawa, MD, PHD

Obstetrics and gynecology (OBGYN)

National Center for Child Health and Development, Japan

View our medical experts