Ive been having random episodes of hives and occasional swelling of my lips and sometimes my fingers since a few weeks prior to my BA. My surgeon told me to take Benadryl and as long as i didn’t have any hives present the day of my surgery i should be fine. I had my breast aug on 6/5. But everyday since i have had the same hives ( i know it is not related to any of the medications or materials used for surgery) . Is it okay that i take Benadryl or Zyrtec ? What affects could this have?