REspected madam, hi in my clinical opinion it seems less likely to be related to virus and so far as relation to the numbing medicine used during the procedure is concerned it`s possible if given intravenous but not possible if infiltrated into the local part. now for lightheadedness relation goes to stress factor first as if she is more concerned for the procedure and the outcome of the same. Elevate that factor take her into confidence that she is fit and fine now, no way to be stressed out. secondly give simple analgesics to relieve from headache. ask her to avoid excess reading or computer work for sometime. Dear hope this makes her clear from the problem. regards bye wishing her a fast and speedy recovery.