I have a rash which itches then burns after itching it is like a red horseshoe with raised skin color inside. I'm taking Benadryl and using cream but it isn't disappearing. It is worse in morning. It seemed to start on my hands then my lips swoll up different sides over 2 days. I just started a new job a week ago & also visited dentist (I'm terrified) and I took Xanax- it all happened from then