Can you get genital herpes from a cankersore in the mouth?

NO!!!!!

canker sores are not related to cold sores. canker sores usually come from someone biting the inside of their mouth and will heal within 7-10 days without medication, although they are sensitive to salt, greasy foods, etc.

Canker sores are inside of the mouth, usually white or grey in color.

Cold sores are a form of herpes and occur OUTSIDE of the mouth, usually above your lip.

Oral sex with a canker sore will probably be painful if you are performing it on a man because of the salt in someone's skin.sore on the lips and in the mouth is a type of herpes and can be spread via saliva to other parts of the body--- not a joke either- you get it in your eye--- serious problems!!!! lysine helps keep the condition under wraps- and red marine algae really helps----stay away from nuts-and p-nuts(they are actually a bean) and chocolate as they irritate the condition
YES, YES and YES!!!! Be very careful!
LPN here
Yes you can.
NO!!!! NO!!!! NO!!!!!! NO!!!!!!! If no herpes is present you probably just have been eating too much salt. - Herpes is different from a cancresore. With herpes the cancresore that appears on the mouth, if it has already been diagnosed as herpes is Herpes Simplex Virus 1 and the genital is Herpes Simplex Virus 2. You could definitely spread them both to either place. Don't let their names fool you - they are not restricted to their place based on their name. You could end up with HSV2 on your mouth and HSV1 on your genitals. Be sure you are washing your hands CONSTANTLY!!! Herpes lesions will be the same but show up in different places. You couldn't look at someone and tell if it was HSV1 or HSV2 on their mouth. Hope this helps!!!