Key Differences: Location, Cause and Treatment
Cold Sores: External Viral Infection
Cold sores are caused by the herpes simplex virus type 1 (HSV-1) and typically appear on the outside of your mouth, primarily on the lips, chin, or nostrils. These small, fluid-filled blisters are highly contagious and can be spread through direct contact, sharing utensils, or kissing. The initial outbreak often begins with tingling, burning, or itching sensations before blisters develop.
Treatment for cold sores focuses on antiviral medications. EverydayMeds offers aciclovir 400mg tablets and aciclovir 5% cream, which may help reduce the severity and duration of outbreaks when taken early. Valaciclovir 500mg tablets provide an alternative antiviral option that requires less frequent dosing.
Canker Sores: Internal Non-Viral Ulcers
Canker sores, also known as aphthous ulcers, are small, painful sores that develop inside your mouth on soft tissues like the inside of your cheeks, lips, tongue, or gums. Unlike cold sores, these are not caused by viruses and are not contagious. They appear as round or oval white or yellow centres surrounded by red borders.
The exact cause of canker sores remains unclear, but triggers may include stress, certain foods, minor injuries from dental work, hormonal changes, or immune system responses. They typically heal on their own within 1-2 weeks without specific antiviral treatment.
Visual and Location Differences
The most reliable way to distinguish between these conditions is location. Cold sores almost always appear on the external surfaces around your mouth - particularly the lip border where it meets your skin. They start as small blisters that may cluster together before bursting and forming crusty scabs.
Canker sores exclusively occur inside your mouth on soft tissues. They never appear on your lips' external surface or outside your mouth. These ulcers have a distinctive appearance with white or yellowish centres and red, inflamed borders.
Treatment Approaches Available
For cold sores, antiviral treatments available through EverydayMeds may help manage symptoms when used appropriately. Aciclovir tablets work systemically, while topical aciclovir cream can be applied directly to affected areas. Starting treatment at the first sign of tingling or burning may provide the best results.
Canker sores typically don't require prescription antivirals since they're not viral infections. Instead, treatment focuses on pain relief and protecting the ulcer while it heals naturally. Over-the-counter treatments, saltwater rinses, and avoiding trigger foods may help manage discomfort.
