Herpes and canker sores are two prevalent illnesses that afflict individuals of all genders and races in their mouths. Because their appearances within the mouth are similar, they are frequently mistaken. While some individuals use the names interchangeably, these illnessesโ etiology, appearance, and symptoms are quite different.
Key Takeaways
- A virus causes herpes, while Canker Sores are not infectious and have a different cause.
- Herpes is a chronic condition, while Canker Sores are temporary.
- Herpes can appear anywhere on the body, while Canker Sores only appear inside the mouth.
Herpes vs Canker Sores
Herpes is a viral infection caused by the herpes simplex virus (HSV), appearing as a cluster of fluid-filled blisters on or around the lips, inside the mouth, or on other parts of the body. A virus does not cause canker sores which are small, painful ulcers that occur inside the mouth.

Herpesย is caused by an infection with that of the herpes simplex virus (HSV), resulting in blisters or sores in and around the mouth or genital area and other indications. There are 2 types of HSV.ย HSV-1 produces oral herpes, which damages the mouth and surrounding tissues, while HSV-2 causes genital herpes, which is frequently transferred sexually.
Canker sores only appear in the mouthโs soft tissue structures, like on the gums or the cheeks. They can be caused by a wide variety of circumstances, which include oral injuries and vitamin shortages. It also comes in a variety of sizes ranging from little to huge. Massive canker sores, also known as major, can be unpleasant and take a very long time to cure.
Comparison Table
Parameters of Comparison | Herpes | Canker Sores |
---|---|---|
Area of occurrence | Outside the mouth | Inside of the mouth |
Degree of presence | Grouped on one corner of the mouth | Found on both sides |
Expansion | Develop from a blister | Begins as a painful soreย |
Appearance | Multiple lesions grouped on the very same reddish ground | Little oval sore with a red perimeter and a white/yellow core |
Intensity | Relatively superficial and temporaryย | Develops further into the tissue, and can be seen or sensedย |
What is Herpes?
Herpes is a viral family that causes open sores and blisters. Numerous patients who contract herpes have no symptoms. When the symptoms are modest, they are often misdiagnosed as another skin ailment.
Signs may include severe genital sores, buttocks, or thighs, itchiness, burning sensation during urinating, and uncomfortable lumps in the crotch. You may suffer flu-like symptoms during the first outbreak (known as primary herpes). Body pains, fever, and headache are some of these symptoms.
Many persons with herpes will have outbreaks of blisters and symptoms from time to time. Symptoms are frequently milder than in the initial epidemic. The frequency of breakouts tends to diminish with time as well.
The virus might invade your body through a flesh break. It can also infiltrate your body through your mouthโs skin or urinary system entrance.
Herpes is most easily transmitted when blisters or sores are visible on the afflicted individual. However, it can expand at any time, even if the individual with herpes is not feeling any indications. Herpes can also transmit from one location on oneโs body to the next.

What is Canker Sore?
Canker sores (aphthous ulcers) are noncancerous ulcers that develop in the soft tissue structures of the mouth. They are spherical, white lesions with a crimson border that can cause agony over many days.
It is unknown what generates canker sores, however, stress, slight damage within the mouth, dietary allergies, and other nutritional deficits may all be factors.
Canker sores, unlike cold sores, are not sexually transferred. They are also not communicable, despite the fact that they may be linked with contagious illnesses. Canker sores, for example, are more prevalent in people with chronic HIV infection due to the virusโs detrimental effects on the body.
The majority of canker sores do not require treatment. They will heal on their own in one to three weeks. On the other hand, serious sores or those that linger after this threshold should be examined.
Canker sores on a regular basis may indicate that you have underlying health issues. You might not have been getting enough of particular vitamins andย minerals in your diet. One should considerย the attention of a healthcare practitioner if a canker sore becomes unbig, unbearably painful, lasts more than three weeks, or is accompanied by a high fever.
Main Differences Between Herpes And Canker Sores
- Herpes sores mainly affect the transitioning layers of the body where mucosa encounters skin, and they areย located outside the mouth.ย Meanwhile, canker sores are constantly on the inside of the mouth, impacting its inner layer: the gums, tongue, and even throat.
- Herpes sores are grouped on one corner of the mouth and seldom cross the centerline, whereas Canker sores can be found on both sides.ย
- Herpes sores develop from a blister (fluid-filled sac), whereas a canker sore begins as a painful soreย and stays like that until they heal.
- Multiple lesions grouped on the same reddish ground are herpes sores. A herpes mouth soreโs base appears clear, whereas A canker sore is a little oval sore with a red perimeter and a white/yellow core that appears on its own (base). If there are several sores, healthy cells generally separate them.
- Herpes is extremely superficial and temporary, however, canker sores can develop further into the tissue, as can be seen, or sensedย (hardness is sensed under the base of where it occurred).

- https://academic.oup.com/jac/article-abstract/12/5/489/827083
- http://www.ident.ws/sites/liebfamdentistry/docs/cankercoldsoresweb.pdf
Piyush Yadav has spent the past 25 years working as a physicist in the local community. He is a physicist passionate about making science more accessible to our readers. He holds a BSc in Natural Sciences and Post Graduate Diploma in Environmental Science. You can read more about him on his bio page.