Welcome! My name isXXXXX am a 2003 graduate, and currently a Medical Director of a veterinary hospital.
I am sorry to hear about this concern.
Well, my first impression would definitely not make me thing of any complication from the dental
extraction or the use of antibiotics.
I would be far more suspicious for problems like environmental or food allergies, and les likely manage (mites).
Also, for a doxie, I would be a bit suspicious for a internal issue like hypothyroidism
(low thyroid hormone) or Cushing's disease (when the body is producing excessive amounts of its own steroids from the adrenal glands). Both conditions are seen in doxie's.
So, if not itching, chewing or licking
, than recommending a antihistamine will be of little benefit. If Deisel is itching or licking a lot, let me know, and I can make a few suggestions.
Otherwise, it does sound like you'll need to get back into a vet for further evaluation. That might need to include a blood profile with a thyroid level.
I hope that information has been helpful.
Please remember to select Reply to Expert, if for any reason you need further clarification, have more questions, or were expecting a different type of answer. My goal is to try and provide you the best answer possible.