Could you explain what is herpes stomatistis gingavitis in a child?

Common: This is an unfortunate (and common) eruption of blisters around the lips and gums. This 'outbreak' is usually bad the first time, and if there are any health-compromised issues in the child. Consult with your dentist for topical-gel or rinses to alleviate pain.

Viral infection: Herpes is a virus that infects almost everyone. Children frequently shows signs of the virus under 5 years of age. It should clear up in ~7-10 days. You can however spread the virus by touching the areas so treat the problem symtomatically. You should contact your dentist or pediatrician for your specific problem and treatment options for your child.