I have a 3 year old son.  He has been running a fever (approx. 102.5 at its worst) on and off since Friday.  Well, today he has complained of his mouth hurting and when I checked inside his mouth, I discovered he has swollen, red gums and a blister-like rash on the center of his tongue.  It breaks my heart to see him like this....I fully intend to visit his pediatrician as soon as she opens tomorrow morning, just wanted to try to get some kind of idea what might be going on.  Thank you in advance for your help!!!
Hi Dear, Welcome to Chat Doctor. Understanding your concern. As per your query your child have symptoms of swollen and inflamed gums with blister on tongue which is mainly because of herpetic gingivostomatitis, it occurs because of poor immunity of body and infection caused by herpes virus. Need not worry about it, it is very common occurrence among child Chat Doctor.  Maintain proper hygiene of oral cavity of child. Take wet cloth and swipe it around gums of child to prevent deposition of microorganisms. Antiviral