I had this procedure done on Wednesday July 4th and everything was fine. I stuck to eating nothing but white foods until today Sunday the 8th. I had white rice , corn on the cob, green peas, lettuce and cucumber plus x2 chicken thighs and macaroni cheese. All of a sudden soon after dinner my upper ip was sore and i could feel a bump and discovered this! but why four days laters? I mean i've always suffered with delayed reflexes......but c'om now!