You didn't know anything at that time, but you heard what the doctor said later, right? Did the anesthesiologist say it or the surgeon say it?
Just explain the situation to the anesthesiologist during the next operation and remind him to pay attention.
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So I ask you, did the anesthesiologist say it or the surgeon say it was an anesthetic allergy?
Surgeons sometimes don't know much about anesthesia, and they may just say it casually to deal with family members' inquiries. Maybe there was nothing wrong at that time.