Ok We were smoking a bowl of marijuana and he got a mouth/cold sore what could happen to him knowingly I do have some small wart HIV negative/Hpv nag?

Damage to your head. It is not from the cold sore or the wart, but from using weed. MJ is a psyho-active drug and it is messing with your brain.
For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex, if you have sex.