Recurring Oral Blisters: Causes and When to See a Doctor - Otolaryngology

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Recurring oral blisters, especially in the area you described near the molars and towards the throat, can be concerning and may have various underlying causes. Given that these blisters appear every few days and are not painful or itchy, it is essential to consider several possibilities.

One common cause of oral blisters is aphthous ulcers, also known as canker sores. These are small, painful lesions that can develop on the soft tissues of the mouth, including the gums, tongue, and inside of the cheeks. However, since you mentioned that the blisters are not painful, this may not be the case.
Another possibility is mucoceles, which are fluid-filled cysts that can occur when a salivary gland duct is blocked or damaged. They often appear as painless, swollen areas in the mouth and can recur if the underlying cause is not addressed. Given your description of the location, it is plausible that a mucocele could be forming in that area.

Allergic reactions to certain foods, dental products, or medications can also lead to the formation of blisters in the mouth. If you have recently changed any products or introduced new foods into your diet, this could be a contributing factor.

Infections, such as viral infections (e.g., herpes simplex virus), can cause blisters in the mouth. However, these typically present with additional symptoms, such as pain, swelling, or fever. Since your blisters are not associated with discomfort, this may be less likely.

Oral lichen planus is another condition that can cause recurring lesions in the mouth. This is an inflammatory condition that can lead to white patches or blisters. It is often associated with stress or certain medications.

Given that you have noticed these blisters for about three weeks and they recur every few days, it is advisable to consult a healthcare professional, particularly a dentist or an oral specialist. They can perform a thorough examination and may recommend further tests, such as a biopsy, if necessary, to determine the exact cause of the blisters.

In terms of urgency, while the blisters are not painful, their recurring nature warrants a visit to a doctor. It is essential to rule out any serious conditions and to receive appropriate treatment if needed. Early intervention can help prevent further complications and provide peace of mind.

In summary, while there are several potential causes for your recurring oral blisters, a professional evaluation is crucial to identify the underlying issue accurately. Make an appointment with a dentist or an oral specialist to discuss your symptoms in detail and receive tailored advice and treatment.