Herpes simplex virus causes blisters or "cold sores" on your child's lips and mouth (viral gingivostomatitis). Anyone at any age can get herpes.
If your child has lots of mouth sores, eating and drinking may be difficult or painful. You need to make sure your child gets plenty of fluids to prevent dehydration.
Symptoms of herpes simplex are:
Your child can spread this virus by mouth contact of any kind and skin-to-skin contact with an open sore on an infected person.
Call your health care provider for an appointment if your child has any signs of dehydration:
Allina Health's Patient Education Department, Guide for the Care of Children: Ages Birth to 5 Years Old, fifth edition. To avoid awkward sentences, instead of referring to your child as "he/she" or "him/her," this guide will alternate between "he" or she" and "him" or "her."
Allina Health's Patient Education Department experts, including the Pediatric Department of Allina Health Coon Rapids Clinic