You have just explained to me what the cause of my hives may be,I had Dental work done in May I was given Advil (600mg strentgh) after root canal
and a tooth removal I broke out in Hives
and it has not gone away, I took the Advil and had quite a lot of it, also given Penicillin , so possibly finally I have found what could have caused it, I am not taking these now so why does it not go away, I have had no painkillers or Penicillin since that time.