Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain red patch at the roof of the mouth that is itchy and itches more when you are around dogs can be due to
allergic reaction caused by Animal Danders that is a common allergen..
I would suggest you to consult an Allergist and get evaluated and he can do a clinical evaluation and also do allergic testing like RAST test,
Patch test etc to rule out the exact cause of allergy and treat you accordingly.
You can be advised to take anti allergics like
Benadryl and levocetrizine as well as do warm saline gargles, gargle with 1:1 solution of
milk of magnesia and benadryl can also help..
Avoiding exposure to allergen and advising you instillation of
Immunotherapy to reduce the severity of allergic symptoms can help..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora.