Hi.
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain your son seems to be suffering from PRIMARY HERPATIC
GINGIVOSTOMATITIS which is a viral infection caused by
Herpes Simplex Virus and leads to fever,irritability and
swollen gums as well as formation of blisters in mouth and gums but fever and swollen gums mostly preceed the formation of blisters..
For fever you can give her
Acetaminophen [Tylenol or Paracetamol]..
For swollen gums you can apply cool packs as it will reduce inflammation and swelling..
In case of blister formation coating them with an antiviral ointment like Acyclovir and a numbing agent can relieve..
Antiviral drugs like Acyclovir,Valacyclovir can be given if the blisters outbreak to reduce the duration of sickness..
Give him a cool and bland diet, bread socket in milk, gelatin, and other soft foods and more of liquids should be given..
Maintain her
oral hygiene by brushing her teeth with an ultrasoft toothbrush..
Provide her ample of rest..
In case if the symptoms does not resolve consult a Paediatrician and get her evaluated..
Hope this information helps..
Thanks and regards..
Dr.Honey Nandwani Arora..