that is the nature of this herpetic beast. it does come back often in the exact same spot or in close proximity. this characteristic often helps clinicians make the diagnosis.
can cold sores come back in only 1 spot all the time. i get a sore on my bottom lip about twice a year its always in the exact same spot. right in the center of my bottom lip. it starts as a lump inside the lip and the next day it works its way from the inside of my lip to the center on the outside. it takes a few weeks to get rid of it. i find that if i keep it dry and do not use lip balm then it goes away faster.