Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns..
As per your complain it seems that periodic swelling of the tongue and lips seems to be most probably due to some unknown allergen causing
angioedema of the lips and tongue..
It can be any food or medication, bug bite, poison ivy etc..
I would suggest you to consult an Allergist and get allergic tests like
Patch test, RAST test, food challenge test etc can help in diagnosis and treatment can be done accordingly..
The tests will help in ruling out the exact cause of the allergen and once you know the cause of the
allergic reaction you can avid exposure to it to prevent allergy attack..
He can be advised to take anti allergics like
benadryl , levocetrizine, Allegra etc..
Oral and injectable steroids can be advised..
As it is recurring condition you can also be instilled an
Immunotherapy that will help in reducing the severity and frequency of allergic attack..
Once the allergen is ruled out avoiding exposure to it can prevent the allergy symptoms..
Hope this information helps..
Regards..