I went to my electrologist on Saturday and I put what I thought was a thin coat of lidocaine.prilocaine my Doctor prescribed before hand and then covered with saran wrap. I did not wash my face right after and in a few hours I was trembling, sweating, heart palpitations, and sore joints. In fact I was feeling so bad I almost asked my wife to call an ambulance. This was the second time before I put 2 + 2 together. As both occurred after an appointment. Just warning you that something as innocuous as a numbing cream can be dangerous.