Is a canker sore a form of herpes?

No. A canker sore is an aphthous ulcer. It occurs indifferent locations than herpetic ulcers. Herpetic ulcers are caused by a virus and occur on the vermillion border of the lip. Aphthous ulcers are on the cheeks and tongue and caused by trauma, stress , hormonal, etc.
No, not herpes. Cold sores (see picture) are on the lips or on the face. They are caused by recurrences of herpes virus, which lives in the nerves after an initial infection, and then travel down the nerves to cause the cold sores at the skin surface from time to time. Canker sores are inside the mouth, and are not from herpes, but are due to the immune system reacting to something on the inside of the mouth.

Related Questions

Could I pass herpes through a canker sore?

No. Canker sores are not herpes so you will not pass this to anyone else. But be careful and make certain you have a canker sore and not herpes because because herpes lesions and canker sores look similar, but they occur on different parts of the mouth. Read more...
No. Herpetic lesions are contagious but viral in origin, cancre sores are not contagious or infectious. They ususally occur due to stress. The treatments for each is quite different. Read more...

If I have herpes and my son gets a canker sore does he have herpes how do u know the differance?

Blood test/culture. Both you and your child can take a blood test for herpes and can culture the sore. That should help narrow it down. Read more...
Herpes test. A blood test done through your medical doctor is the only way to know for sure. Read more...
Have it looked at. A physician or dentist can examine the sore and determine the cause. It may be something else as well, so it's important to have it looked at if it doesn't go away within a week or two. Read more...
Herpes vs Aphthous. Oral herpes is an infection caused by the herpes simplex virus and is contageous and looks more like a blister. Apthous ulcers also known as a canker sore, is a type of mouth ulcer that presents as a painful open sore inside the mouth or upper throat characterized by a break in the mucous membrane. Its cause is unknown, but they are not contagious. Read more...
Different. The familiar white "canker" sores inside the mouth that hurt when you drink orange juice are not herpes. Anyone who tells you otherwise is mistaken. Read more...

If I had a canker sore and put aloe on it before I went to bed, then went away over night. Was that canker sore herpes?

Not likely. Herpes tends to stick around for several days. Herpes lesions typically reoccur in the same place, form on the skin as groups of small vesicles, have a clear discharge, and crust upon healing. If the sore went away overnight, it's not likely herpes. Read more...
Unlikely. This does not sound like a herpes infection. Herpes infections do not typically disappear overnight. Read more...

Oral herpes or canker sore, what's the difference?

See. http://voices.yahoo.com/canker-sores-vs-cold-sores-whats-difference-2270211.html or http://www.Uhs.Umich.Edu/coldcankersores. Read more...
Very different. Aphthous ulcers (cankers) are on the gums or tongue, different spots on different days. Herpes will come on the same place on the lip, usually after a tingling (prodrome). Treatment ; symptoms are very different. Read more...

How can I tell if I have a canker sore or herpes on my gums?

Appearance/location. Also the history, and duration of the lesion all factor into a proper diagnosis. The treatments are different so get it evaluated by a dentist or primary care provider familiar with oral lesions to be sure ... Read more...
Not likely. HSV-1 blisters can occur on many different parts of the body but are most common on or around the lips and not on your gums. Canker sore is most likely. Read more...

How to tell the difference between a canker sore and oral herpes?

Canker solitary. Herpes are usually in clusters of two or more sores. The area around and under the ulcer is hard, swollen & tender. The edges of the herpetic ulcer are typically indistinct. A canker is usually a solitary ulcer with a discrete uniform edge, round to oval in shape, with a definite bottom - like a crater on the moon. The area around & under the canker is neither swollen nor hard. Read more...

How can I tell if I have herpes or a canker sore on my tongue?

See MD or DDS. While I can tell you the basic differences between the two and you can Google if for further information as well as photos, ONLY by seeing a trained health care professional, whether it's a physician or a dentist can you be sure. Read more...
Few Tips. Herpes simplex virus type 1 causes cold sores. HSV sets up shop in your ganglion neurons and reactivates during times of stress or when your immune system takes a hit. Pain, burning, tingling, and itching often proceed outbreaks which last around 5 days. Canker sores are painful oral lesions that look like shallow, round ulcers. Flares with hormone changes, food/drug hypersensitivity, and stress. Read more...
Canker vs herpes. Herpes are a cluster of blisters that first appear clear then become cloudy. First infection may be inside the mouth, but cold sores generally appear outside the mouth on the lips. Canker sores are gray or white sores surrounded by a red inflamed area. They occur only inside the mouth, on the tongue or the insides of the cheeks, lips or throat. Read more...