Yes, all cold sores are caused by hsv1.
Most people get it from a family member as kids, just by a kiss on the mouth. Others get it as adults from either kissing or oral sex.
Aj
if ive had a cold sores before i ever started having sex were those considered herpes one
if it is not considered to be an std then did i get it from having oral sex and can i give it to someone else if i dont have a cold sore
Yes, you can transmit it to someone else. You have herpes type 1, and if you perform oral sex on someone else, especially when you have an active cold sore, you could give them genital herpes type 1, which accounts for 30-50% of new genital herpes infections a year.
Its not considered an std, but it can be sexually transmitted. For more info on this, see the herpes forum.
Aj