Cold Sore Inside Mouth: Quick Reference Guide

Cold sores inside the mouth can be particularly uncomfortable and disruptive to daily activities like eating and speaking. These painful ulcers, caused by the herpes simplex virus, typically appear on the gums, inside of cheeks, or roof of the mouth. While they usually heal within 7-10 days, antiviral treatments like aciclovir can help reduce symptoms and healing time when started early.

  • Cold sores inside the mouth are caused by herpes simplex virus (HSV-1 or HSV-2)
  • Early treatment with antivirals like aciclovir may reduce severity and duration
  • Symptoms include painful ulcers, difficulty eating, and possible fever
  • Most heal naturally within 7-10 days without treatment
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Available Treatments

Choose from a wide range of clinically-proven, safe, and effective treatments for Cold Sore.

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Aciclovir Tablets

From £12.99

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Aciclovir 5% Cream

From £8.99

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Valaciclovir

From £18.99

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Valtrex

From £34.99

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Treatment Options for Intraoral Cold Sores

Understanding Cold Sores Inside the Mouth

Cold sores that develop inside the mouth, medically known as intraoral herpes lesions, differ from the more common cold sores that appear on the lips. These painful ulcers typically occur during a person's first exposure to the herpes simplex virus and can be more severe than recurrent lip cold sores.

Recognising the Symptoms

Intraoral cold sores often begin with a tingling or burning sensation before developing into painful, shallow ulcers with red borders. You may experience difficulty eating, drinking, or swallowing. Some people also develop fever, swollen lymph nodes, and general malaise, particularly during initial outbreaks.

When to Seek Treatment

Treatment is most effective when started within 72 hours of symptom onset, ideally at the first sign of tingling or discomfort. EverydayMeds offers several antiviral options including aciclovir 400mg tablets, which may help reduce the severity and duration of symptoms when taken as prescribed.

Available Treatment Options

Prescription antivirals like aciclovir work by inhibiting viral replication, potentially shortening outbreak duration. Valaciclovir tablets offer an alternative with less frequent dosing requirements. For topical relief, aciclovir 5% cream may provide localised treatment, though access to intraoral areas can be challenging.

Managing Symptoms at Home

Alongside antiviral treatment, pain relief measures include avoiding spicy or acidic foods, using a soft-bristled toothbrush, and staying well-hydrated. Over-the-counter pain relievers may help manage discomfort during the healing process.

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