Guys, pay attention very closely:
1. Coldsores are generally caused by Herpes Simplex Virus 1.
2. Mat herpes, or herpes gladiatorum, is ALSO caused generally by HSV 1.
3. However, both HSV 1 or 2 can appear ANYWHERE on the body, though 1 is usually found on the face or body, and 2 is usually found on the genitals. So that shit about your cold sore not being a risk to others is bullshit. You have a cold sore, you have herpes. Period.
4. If you have a cold sore, mat herpes sore, or genital herpes sore, and you decide to roll, you will likely pass it to whomever you roll with.
5. Even if you do not have the sore erupted, it can "shed" the virus days before and after it appears. And yes, the virus can transmit through your sweaty clothing during a roll.
6. IMO, definitely you should quit grappling sports if you have herpes of any sort. The reason it is so prevalent in wrestling and soon to be BJJ is because guys won't quit when they discover they have it.
Don't be a selfish jerk. Be a man and find a different sport where you won't be passing along your disease to innocent people.