Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concerns...
As per your complain if you have relapses of allergy symptoms there are chances that the wasp stinger is still embedded on the skin surface and as there must be release of the toxin intermittently and there is re-occurrence of allergy symptoms..
You should consult a physician and get evaluated so that he can observe you properly and if there are stinger present he will remove it, along with it you need to take anti allergics like
Allegra or
Benadryl..
In case if there are severe symptoms like excessive itching or swelling injectable
steroid can be given by the doctor..
If there is pain anti inflammatory painkillers like
Ibuprofen can be taken..
You should apply a Steroid based ointment like 1%
Hydrocortisone over the bite areas for reducing Inflammation and swelling..
Applying cold packs also helps..
Hope this information helps..
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Thanks and regards..
Dr. Honey Nandwani Arora..