Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain it seems that due to yellow jacket sting there has been
allergic reaction to the toxic venom injected by the stinger..
You should continue giving him
Benadryl or Allegra..
You can also take anti-inflammatory painkiller like
Ibuprofen..
Do cool compresses over the bite areas..
You can also apply a steroid ointment over it..
Avoid scratching the areas if they itch to prevent infection..
In case if there are symptoms like
dizziness, breathlessness, choking etc consult an Emergency room immediately..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora..