Oral Blisters and Unidentified Bumps: When to Seek Help - Otolaryngology

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Oral blisters and unidentified lesions?


Hello, doctor.
A couple of days ago, I noticed a bubble-like bump on the back left side of my mouth, and there are also some irregular protrusions deeper inside.
I would like to know if this is a normal condition and if I need to see a doctor for an examination.
Thank you!

Ike, 20~29 year old female. Ask Date: 2016/10/19

Dr. Zheng Jueyi reply Otolaryngology


Hello: Upon initial examination, it appears to be normal tonsillar lymphoid tissue.
If discomfort persists or if there is an increase in size, it is advisable to seek medical evaluation and treatment.
Wishing you safety and health.
Sincerely, Dr.
Jue-Yi Cheng, Director of the Department of Otolaryngology, Taoyuan Hospital, Ministry of Health and Welfare.

Reply Date: 2016/10/19

More Info


When it comes to oral health, the appearance of blisters or bumps in the mouth can be concerning and often prompts questions about their nature and whether medical attention is necessary. Based on your description of a blister-like bump on the left side of your mouth, it is essential to consider several factors before determining the appropriate course of action.

Firstly, oral blisters can arise from various causes, including but not limited to:
1. Canker Sores (Aphthous Ulcers): These are small, painful lesions that can appear on the soft tissues of the mouth. They are usually round or oval with a white or gray center and a red halo. Canker sores are not contagious and often resolve on their own within one to two weeks.

2. Herpes Simplex Virus (HSV): Oral herpes can manifest as painful blisters or sores, typically around the lips but can also occur inside the mouth. These blisters may burst and crust over, and they are contagious.

3. Mucocele: This is a fluid-filled cyst that can occur when a salivary gland is blocked or damaged. Mucoceles are usually painless and can appear as a bluish or clear bump.

4. Oral Lichen Planus: This is a chronic inflammatory condition that can cause white patches, red swollen tissues, or sores in the mouth. It may present with irregular bumps and can be associated with discomfort.

5. Benign Tumors or Growths: Sometimes, bumps in the mouth can be benign growths such as fibromas or papillomas. These are usually painless and do not require treatment unless they cause discomfort or cosmetic concerns.

6. Malignant Lesions: Although less common, it is crucial to consider the possibility of oral cancer, especially if the bump persists for more than two weeks, changes in appearance, or is associated with other symptoms such as pain, difficulty swallowing, or unexplained weight loss.

Given the variety of potential causes, it is advisable to seek medical attention, especially if:
- The bump persists for more than two weeks without improvement.

- You experience significant pain, swelling, or difficulty eating and drinking.

- There are changes in the color or texture of the bump.

- You notice any additional symptoms such as fever, swollen lymph nodes, or unexplained weight loss.

A healthcare professional, such as a dentist or an oral surgeon, can perform a thorough examination and may recommend diagnostic tests, such as a biopsy, if necessary, to determine the exact nature of the bump. Early intervention is key to addressing any underlying issues and ensuring appropriate treatment.

In summary, while some oral bumps may be benign and self-limiting, it is always better to err on the side of caution. If you have any doubts or if the bump is causing you concern, do not hesitate to consult a healthcare provider for a proper evaluation. Your oral health is vital, and addressing any abnormalities promptly can help prevent complications and ensure peace of mind.

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