What could be the cause of a particularly bad smell coming from the innermost tooth?

The innermost tooth having a particularly bad odor may be caused by large gaps between teeth, dental caries, periodontal abscess, gingivitis, or apical periodontitis. Detailed analysis is as follows:

1. Large tooth gaps

If the gaps between your teeth are relatively large, food impaction can easily occur during eating. If food debris is not promptly removed from the mouth, it may lead to bacterial growth and fermentation, resulting in bad breath and localized foul odor.

2. Dental caries

When tooth decay occurs, cavities may form in the tooth crown, allowing dirt and food residues to accumulate within the cavity. Failure to clean these promptly can cause fermentation and produce an acidic, unpleasant smell.

3. Periodontal abscess

A periodontal abscess around the tooth is usually caused by bacterial infection in the oral cavity. It not only causes bad breath but may also lead to localized pain.

4. Gingivitis

Gingivitis is an inflammation of the gum tissue and may also be accompanied by bad odor, especially in areas where teeth are difficult to clean.

5. Apical periodontitis

Apical periodontitis is an infection of the tissues surrounding the tooth root apex. It is often associated with unpleasant odor and may also cause pain.

It is recommended to seek timely diagnosis and treatment at the dental department of a reputable hospital.