Cold Sores About Cold Sores Cold sores are small but painful blisters that can appear around the mouth area, face, or nose drug . Occasionally referred to as fever blisters, they’re caused by herpes simplex virus type 1 . Kids can get chilly sores by kissing or sharing eating utensils with an contaminated person. Colds sores in the mouth area are very common, and several kids get infected with HSV-1 during the preschool years. The sores disappear completely by themselves within in regards to a week usually. Symptoms Most children who get cold sores get infected by consuming or drinking from the same utensils mainly because someone who is contaminated with the herpes virus or by getting kissed by an infected adult. The cold sores first form blisters on the lips and inside the mouth.