Yes you can help get rid of and treat cold sores using apple cider vinegar since the apple cider vinegar contains antibacterial properties which can help clear up the cold sore.
To get rid of a cold sore with apple cider vinegar just apply the apple cider vinegar topically to the cold sore.
If you have a canker sore inside your mouth you can get rid of the canker sore by gargling with the apple cider vinegar and then spitting it out.